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In 2 1/4 hours, nick wrote 36 messages. What was his unit rate during that time

i need help sovilng this problem for math

The radius of a circle is increasing at a rate of 3 ft/min. At what rate is its area changing when the radius is 4 ft? (Recall that for a circle, A = πr2.)

let c = (0 to π ) ∫ e^(-2x) * cos x dx and s = (0 to π ) ∫ e^(-2x) * sin x dx a) show by integration by parts , or otherwise that c = 2s and s=-2c+1+e^(-2π) b) hence,...

It took 8 painters 6 hours to paint a gym. How long would it take 12 painters? How many person-hours does this job require?

Find a 90% confidence interval for the population average startup costs µ for candy store franchises

Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy...

When σ is unknown and the sample is of size n ≥ 30, there are two methods for computing confidence intervals for μ. Method 1: Use the Student's t distribution with d.f. = n − 1. This is the...

What price do farmers get for their watermelon crops? In the third week of July, a random sample of 38 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that σ is...

It is estimated that 3.2% of the general population will live past their 90th birthday. In a graduating class of 737 high school seniors, find the following probabilities. (Round your answers to four...

the number is four million, two hundred sixteen thousand, ninety?

The surface ,or rim ,of a canyon is at an altitude of58 meters.on a hike down into the the canyon;a party of hikers stops for a fest 101 meters below the rim?then they descend 52 meters. what...

Find the value of k such that the system of linear equations is inconsistent. 6x + 2y = 8 −9x + ky = −11 k=?

"In a football game, Team A defeated Team B by a score of 28 to 10. The total points scored came from a combination of touchdowns, extra-point kicks, and field goals, worth 6, 1, and 3 points,...

What is the mechanical advantage of a claw foot hammer having a handle with a length of 45 cm and head length of 10 cm? a. 1/9 b. 2/9 c. 2/5 d. 5/2 e. 9/2 f...

At a dilapidated playground, people have stolen the support bar to a merry-go-round leaving a flat disk that can rotate freely. While pondering conservation of angular momentum, a curious physics...

Driving slowly down a two-lane highway a large transport truck passes me going the same way as I am. As he does physics flashes before my eyes, and I think Bernoulli’s principle with pressure and...

At a dilapidated playground, people have stolen the support bar to a merry-go-round leaving a flat disk that can rotate freely. While pondering conservation of angular momentum, a curious physics...

In considering density and buoyancy, a helium balloon floats in air even as wood floats on water. A father was bringing home balloons for a party and had attached the balloons to the seat of a van...

The new blade on my table saw has a radius of 15.0 cm. My table saw has a maximum speed of 3750 rpm. If it takes 2.50 seconds to get up to this final speed, what is the tangential velocity of the...

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