A jeweler has 10 ounces of an alloy that is 50% gold. How much more pure gold does the jeweler need to add to this alloy, to increase the percentage of gold to 60%?

A scientist is investigating the effects of cold on human skin. In one of the scientist? s experiments, the temperature starts at 70? F and drops by 1/10? every 2 minutes. What is the temperature after 6 minutes?

In triangle PQR find the measure of angle P if PQ is 57.6 and QR is 33.8

X + y = 0 3x - 2y = 10 Which of the following ordered pairs (x, y) satisfies the system of equations above? A) (3,-2) B) (2,-2) C) (-2,2) D) (-2,-2)

Why does the base of an exponent have to be greater then 1

Determine whether the following is an example of a sampling error or a non sampling error. A researcher studied brother-sister pairs to see if there is a difference in IQ scores.

On the last history quiz, Kanesha answered 0.75 of the 20 questions correctly. How many questions did Kanesha answer correctly?

When one New Zealand dollar, NZ$0.77, was worth US$0.77, how much was US$1.00 worth in New Zealand dollars?

Select the letter of the correct answer. Suppose a bucket contains 1,898 sunflower seeds. If this bucket contains 26 times more seeds than another bucket, how many sunflower seeds are in the other bucket?

He radius r of a circle is increasing at a rate of 6 centimeters per minute. find the rate of change of the area when r = 35 centimeters. cm2/min

What is the volume of a cylinder, in cubic inches, with a height of 6 inches and a base diameter of 20 inches? Round to the nearest tenths place