2,690 Answered Questions for the topic SAT math

12/20/19

Please help me this is hard
Suppose Violet is laying on the ground looking up at the sun that appears just over the top of a tree at an angle of elevation of 23°. She is located 12 yards away from the base of the tree. How... more
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Sat Math

12/18/19

There are 3 times as many males as females on the maths course at university. What fraction of the course are female? Give your answer in its simplest form.
1/4 of the course is female.Step-by-step explanation:Let's call x the number of females on the course ⇒ The number of males would be 3xThe total number of students would be x + 3x = 4x.Based on... more
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12/16/19

Please help me I really need to figure this question out.
An 18-foot ribbon is attached to the top of a pole and is located on the ground 10 feet away from the base of the pole. Suppose Mateo has a second ribbon that will be located an additional 23 feet... more
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12/14/19

How many cakes does Johnny have to sell to make the $600 back?

Johnny makes cakes on the weekends, For every cake Johnny makes he spends $2 on ingredients, and sells every cake for $10. But he had to spend $600 on pans and stuff before he even started. How... more
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12/12/19

Distance/Revenue
A woman bought a number of items for $60. She realized that if she had bought 6 more items for the same money, she would have paid $5 less per item. How many items did she buy?
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Sat Math

12/10/19

write the quadratic equation whose roots are 5and 1, and whose leading coefficient is 4
write the quadratic equation whose roots are 5and 1, and whose leading coefficient is 4
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Sat Math Algebra 1

12/09/19

A farmer grows only pumpkins and corn on her 420- acre farm. This year she wants to plant 250 more acres of corn than pumpkins. How many acres of each crop should the farmer plant?
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Sat Math Math Logic Sat

12/07/19

Fixed Point Arithmetic

Suppose we have to add 12.5 and 1.25 using fixed point arithmetic 1) integer form Scale factor -2 and 2) fractional form Scale factor 4 Do we consider the decimal point(.) as a digit in each... more
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12/07/19

Word Problem Solving Equation
A sound wave is given the following equation:y= 8 sin(512πt) where t= time in seconds.How many cycles will occur between t=2 and t=3.5 seconds?
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12/07/19

Math Equation Help

Find the vertical shift.y=0.9(sin(pi/3-x)+0.01)
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12/06/19

Problem Solving Equation
A sound wave has an equation. y= 7 sin(58πt) where t= time in seconds. What is the frequency?
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12/06/19

World Problem Solving

A mouse wanders through a maze 3 feet East, 4 feet North, 2 feet East, & then 5 feet North. How far is the mouse from its starting point?Round to the nearest tenth.
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12/06/19

Word Problem Solving
A ship's bearing is 240°. If a submarine, due east of the ship, shoots a torpedo traveling 5 times as fast as the ship, what angle should the submarine fire the torpedo in order to hit the ship?
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12/06/19

Finding an inverse function
Determine whether function has an inverse function, if it does, find the inverse function. f(x) = x4f(x) = 3x + 5
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12/05/19

Problem Solving (Word Problem)
A plane, 50 miles away from its destination, is flying toward the airport at an altitude of 30,500 ft. Later, this same plane is 20 miles from the airport and has descended to an altitude of 18,000... more
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12/05/19

Differential Equations

How do we solve the equation,(D^2 - 2D + 1)y = e^2x(cosh2x + cos2x)
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12/04/19

Pattern Proof - Logic
Symbolize and test for the validity of the following arguement using pattern proof If u send me a message then I will come to meet you. If you do not send me a message then I will go to China.... more
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12/03/19

D Operators - Differential Equations

Using D Operator method find the general solution of the differential equation,d^y/dx^2 - 2dy/dx + 2y = 1
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12/02/19

Moment Generating Function

Let X has a probability density function f(x) = k/(a-b) ; a<x<bf(x)= 0 elsewhere how do we find the moment generating function of Y= 10X+3
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12/02/19

Chebyshev's Theorem

What is difference between taking the lower bound and lower limit from Chebyshev's Theorem?If P(|Y- mean|) <= 1 - (1/r^2) Do we have to consider 1 - (1/r^2) as the lower bound?
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12/02/19

Geometric distribution

Let y denote a geometric random variable with probability function p(y)=p*(q)^(y-1) y=1,2,3,... o<=p<=1 , q = 1-pShow that 1)for a positive integer a , P(Y>a)= q^a And 2) for positive... more
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11/27/19

Problem Solving (Word Problem)
The number of hours of daylight on the summer solstice (the 172nd day of the year) is 15.3 and the number of hours of daylight on the winter solstice (the 355th day of the year) is 9.1. Complete... more
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Sat Math Math Calculus Algebra

11/26/19

What sample size is needed to give a margin of error of 4% with a 95% confidence interval? Sample size =

What sample size is needed to give a margin of error of 4% with a 95% confidence interval?Sample size = 
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Sat Math Math Calculus Algebra

11/26/19

A polling organization conducts a poll by making a random survey of 2000 people. Estimate the margin of error at a confidence level of 95% using the rule of thumb for the margin of error.

A polling organization conducts a poll by making a random survey of 2000 people. Estimate the margin of error at a confidence level of 95% using the rule of thumb for the margin of error. Round... more
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Sat Math Math Calculus Algebra

11/26/19

A polling organization conducts a poll by making a random survey and is willing to accept a margin of error of 4% at a confidence level of 95% using the rule of thumb for the margin of error.

A polling organization conducts a poll by making a random survey and is willing to accept a margin of error of 4% at a confidence level of 95% using the rule of thumb for the margin of error. What... more
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