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?

What is the percent?

Use the shell method to find the volume of the solid generated by revolving the region bounded by the line y=x+2 and the parabola y=x^2 about the following lines. (A) The line x=2 (B) The line x=-1 (C) The x-axis (D) The line y=4

What is 47.951 to the nearest tenth

5a (-3b) (-2a^2b^3) what is the answer to this question?

Determine the equation of the circle graphed below. SOON (6,6) (5, 3)

The mean of 3 consecutive terms in an arithmetic sequence is 10, and the mean of their squares is 394. What is the largest of the 3 terms?

A race at travels at a rate of 205 mph how far would it travel in 3 hours?

What is 8/20 of an hour

An actor invests some money at 9 % simple interest, and $24,000 more than three times the amount at 10 % simple interest. The total annual interest earned from the investment is $38,670. How much did he invest at each amount? Use the six-step method.

A forest ranger in a 120ft observation tower sees a fire. The angle of depression to the fire is 10 What is the horizontal distance between the tower and the fire