How to solve the sum of arithmetic series?

If a cylinder of radius 2 cm and height 4 cm is submerged in a graduated cylinder of radius 3 cm containing a liquid. By how much does the liquid rise?

What is the answer for this question? 1/2x+3/2 (x+1) - 1/4=5

For large parties, a restaurant adds a 15% service charge to the bill. how much would be added to a bill of $638.40?

Thirty cows. Twenty-eight chickens. How many didn't?

Engineers want to design seats in commercial aircraft so that they are wide enough to fit 90 % of all males. (Accommodating 100% of males would require very wide seats that would be much too expensive.

Simplify using the horizontal method. (2n2 + 4n + 4) (4n - 5) a. 8n3 + 4n2 - 6n - 20 b. 8n3 + 26n2 - 36n - 20 c. 8n3 - 6n2 + 36n - 20 d. 8n3 + 6n2 - 4n - 20

A factory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. The factory will make 50 gallons of this purple paint.

Sierra has 3 days to drive 932 miles. She wants to have completed 75% of the drive by the start of day 3. What distance should she drive on each of the first two days?

36 is how many times greater than 6? 4 6 9 5

Q+r/s when q=31, r=48, and s=6