Amy worked for 4 hours and made $50. After 6 hours she made $75, and $125 after 10 hours. Is there a proportion?

From a normally distributed population, a simple random sample of size 30 is taken. The mean of the sample is 144 and the standard deviation of the sample is 12. Construct a 90% confidence interval for the population mean. A. (139.7, 148.3) B. (140.

The temperature of an oven went from 280 to 350 what was the percent increase in temperature

Compare the numbers - 3 1/2 and - 3 4/5. Use the symbols, or =.

In 1935, Harvard linguist George Zipf I wanted out that the frequency of the Kth most frequent word in a language is roughly proportional to 1/K.

What is the quotient when (x+3) is divided into the polynomial 2x2+3x-9

Suppose that people's heights (in centimeters) are normally distributed with a mean of 170 and a standard deviation of 5. We find the heights of 50 people.

6:3:3 in its simplest form

Enrique is measuring the mass of a flower petal. Which unit of measurement should he use to eliminate the need to write the value in scientific notation

If the tomatoes are 6 for $4 how much will 15 tomatoes cost

What is the rate of change y=x (-3) + 8