A chemist needs a 70% solution of tannic acid. How much distilled water must he add to 5 gallons of a 90% solution of acid to obtain the 70% solution?

Running times for 400 meters are Normally distributed for young men between 18 and 30 years of age with a mean of 93 seconds and a standard deviation of 16 seconds. Thus, 99.7% of running times are approximately between: A. 61 and 125 seconds B.

What are the prime numbers between 20 and 70

Could a quadrilateral have 4 obtuse angles?

22. What are the solutions of the equation? x8+4=0 a. No solution b. x = - 32 or x = 32 c. x = - ½ or x = ½ d. x = - 2 or x = 2

A cone has a diameter of 6 cm and a height of 11.5 cm. Find the volume. Round your answer to the nearest 10th if necessary. Use 3.14 for pie.

You roll a fair number cube Find each probability 1. P (3, then 5) 2. P2, then) 3. P. then odd)

The factor theorem of algebra states that if a polynomial, P (x), is divided by x-a, then the remainder is P (a). Verify the remainder theorem by showing that when x^2-2x-16 is divided by x+3 the remainder is the same as P (-3).

Jane cuts a piece of twine into three pieces. The second pieces is 7 times as long as the first piece, and the third piece is 5 feet longer than the first piece.

Meg has a piece of poster board that is two and two-fifths feet wide. she needs to fold it into three equal sections. how wide will each section be? two-thirds feet four-fifths feet six and two-fifths feet seven and one-fifth feet

If the hot dog eating champion's goal is to eat 1 hot dog every 13 seconds, how many whole hot dogs does he expect to eat in 12 minutes?