02/19/23

normally distributed lifespan, with a mean of 7.1 years, and standard deviation of 0.5 years. The 4% of items with the shortest lifespan will last less than how many years?
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02/19/23

geometric progression
the 8th term of a geometric progression[G] is -7/32. find it common ratio if its first term is 28
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02/19/23

marbles question math

bag contains 10 red marbles, five white marbles, eight blue marbles. you draw out five marbles out of random without replacement. what is the probability that all the marbles are red? and what is... more
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02/19/23

Which of the following formulas shows the Law of Cosines? “Justify your answer”
A) c^2 = a^2 + b^2 - 4ac + cosAB) c^2 = a^2 - b^2 - -2abcosCC) c^2 = a^2 + b^2 - 2cosCD) (cos A)/a = (cosB)/b
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02/19/23

The sine rule for a triangle states that…(explain the reason)
A) a/sin A = b/sin B = c/sin CB) sinA/a = sin B/b = sin C/cC) a/sin A + b/sin B + c/sin CD) 2a/sin A = 2b/sin B = 2c/sin C
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02/19/23

Satellite question
An earth-orbiting satellite is passing between the oak ride laboratory in Tennessee and the Langley research center in Virginia, which are 446 miles apart. If the angles of elevation to the... more
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02/19/23

evaluate the following and break even analysis

Evaluate the following: rose bought 9 pens and 7 pencils and paid a total of $14.80. Ann bought 2 pens and 10 pencils and paid $7. find the price for a single pen and a single pencil one number is... more
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02/19/23

Trigonometry Story Problem
To measure the height of the cloud cover at an airport, a worker shines a spotlight upward at an angle of 73° from the horizontal. An observer 734 m away measures the angle of elevation to the spot... more
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02/18/23

If f(x)=ln(ln(x)) find f′(6) ,correct to at least five decimal places.

f’(6)=
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02/18/23

If f(x)=ln(x^3+1) find f′(7) correct to at least five decimal places.

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02/18/23

Factoring Quadratic Expressions
What is the relationship between the Factors and the Factorised Expression?
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02/18/23

Solve the equation secx cscx = 2secx
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02/18/23

How long is the ladder?
The top of a ladder slides down a vertical wall at a rate of 0.375 m/s. At the moment when the bottom of the ladder is 6 m from the wall, it slides away from the wall at a rate of 0.5 m/s. How long... more
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02/18/23

Find the rate at which the distance from the plane to the station is increasing when it has a total distance of 4 mi away from the station.
A plane flying horizontally at an altitude of 3 mi and a speed of 460 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when... more
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02/18/23

D and E are sets of real numbers defined as follows. D= {x | x< 1} E = {x | x≤8} Write DnE and DUE using interval notation. If the set is empty, write ø.
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02/18/23

If cot 𝜃 =−20/21 and sin𝜃 <0, what Quadrant is 𝜃 in? If cot 𝜃 =−20/21 and sin𝜃 <0, use a Pythagorean identity and your answer to the previous question to determine sec𝜃.

Its 2 different questions.. help please
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02/18/23

a washing machine retailers for $520. If the store owner makes a profit of 30%, how much did she pay for the washing machine at wholesale?
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02/18/23

Maths- exponent question
If 3^a = 21^c and 7^d=21^cshow that c= ad/a+d
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02/18/23

how do i solve solving linear equations by multiplying first
how do i solve solving linear equations by multiplying first
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02/18/23

Rafael started a test at 9:19 AM and finished it at 9:41 AM
I dont understand what to do
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02/17/23

GRAPH TRANSFORMATION
 Suppose that the graph of a given function f(x) contains the point (9, 4). What point must be on each of the following transformed graph? Please write your answer as pints (a, b) including the... more
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02/17/23

In the year 1970, the averge male life

In the year 1970, the averge male life exspectance in the united states was 67.1 years, and in the year 2010 it grew to 76.2 years let x represent the years and y f(x) represent the male life... more
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02/17/23

After 79.0 min, 39.0% of a compound has decomposed. What is the half‑life of this reaction assuming first‑order kinetics? t1/2=minutes?
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02/17/23

Joyce paid $48.00 for an item at the store that was 40 percent off the original price. What was the original price? 
$: Give your answer to the nearest cent.
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02/17/23

A store has clearance items that have been marked down by 20%. They are having a sale, advertising an additional 55% off clearance items.

What percent of the original price do you end up paying? Give your answer accurate to at least one decimal place.
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