535 Answered Questions for the topic SAT math

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

11h

Differential Equations

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

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

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

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 = 

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

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

How do I develop a function that models the bacteria in relation to time? (data provided)

Time (hours) 1 2 3 4 5 Bacteria weight (grams) 11.0 19.7 34.6 61.7 117.8

10d

A little help here?

A woman earned wages of $53300​, received $2700 in interest from a savings​ account, and contributed ​$2500 to a​ tax-deferred retirement plan. She was entitled to a personal exemption of $3000... more

10d

Circle Quadratic System of Equation problem

x2+y2=25y=x2-13If possible, rewrite the system shown above, keeping one of the equations the same but changing the other equation to satisfy each of the following stated requirements. If the change... more

11d

Translating and solving equations

what is 9 less than the product of a number and -4 is 35

14d

Solve for V in the equation h=-16t^2+vt+k

h=-16t^2+vt+k The equation above gives the height h, in feet, of a ball t seconds after it is thrown straight up with an i speed of v feet per second from a height of k feet.The equation above... more

15d

Word Problem Solving

An 80-feet rope is attached to a boat 7 feet above the water level and a boy jumps over the wake while wakeboarding. What is the distance between his hands and the water level if the angle given is... more

16d

Word Problem Solving

a jet airliner, flying initially at 300 mi/hr due east, suddenly enters a region where the wind is blowing 100 mi/hr, pushing the aircraft in the direction 30° north of east. what is the resultant... more

16d

Find the horizontal shift

what is the horizontal shift of this function? y=8.1(2+3cos(x-pi/2))

17d

Problem Solving, Parallelograms

Two Adjacent Sides Of A Parallelogram Are 29' And 37", Respectively. The Angle Between These Two Sides Is 65° Find The Length Of C.

17d

Area of Triangles Problem Solving

a painter needs to find the area of the gable end of a house. what is the area of the gable if it is a triangle with two sides of 42 ft that meet at a 105° angle? round to the nearest hundredth.

17d

What is your expected value for a game where your probability of winning is 1/9 and your profit is four times your wager? (Round your answer to one decimal place.) %

What is your expected value for a game where your probability of winning is 1/9 and your profit is four times your wager? (Round your answer to one decimal place.) %

17d

A card game goes like this: You draw a card from a 52-card deck. If it is a face card (jack, queen or king), you win $6; otherwise, you lose $2. What is your expected value for this game?

A card game goes like this: You draw a card from a 52-card deck. If it is a face card (jack, queen or king), you win $6; otherwise, you lose $2. What is your expected value for this game? (Round... more

17d

Bill and Larry toss two coins. If both coins come up heads, Bill pays Larry $4. Larry pays Bill $1 otherwise. What is the expected value of this game for Bill? %

Bill and Larry toss two coins. If both coins come up heads, Bill pays Larry $4. Larry pays Bill $1 otherwise.What is the expected value of this game for Bill? %

17d

A company produces products at a cost of $36 each. Defective products cost an additional $14 each to repair. The probability of no defective products is 80%.

A company produces products at a cost of $36 each. Defective products cost an additional $14 each to repair. The probability of no defective products is 80%. The probability of 5% defective... more

17d

You play a gambling game with a friend in which you roll a die. If a 1 or 2 comes up, you win $10. How much should you lose on any other outcome in order to make this a fair game? $

You play a gambling game with a friend in which you roll a die. If a 1 or 2 comes up, you win $10. How much should you lose on any other outcome in order to make this a fair game?$ 

17d

You play a gambling game with a friend in which you roll a die. If a 1 or 2 comes up, you win $6.

You play a gambling game with a friend in which you roll a die. If a 1 or 2 comes up, you win $6. Otherwise you lose $2. What is your expected value for this game? Round your answer to the nearest... more
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