A lumberman stacks planks of wood, starting with 30 planks in a row. Each row he stacks has one less plank than the row below it. The last row he stacks has 15 planks. How many rows of planks has he stacked?

12

15

16

18

Under ideal conditions a certain bacteria population is known to double every 66 hours. Suppose there are initially 600bacteria

12 rows with 14 seeds in April and 8 rows with 12 seats in each row if 272 band members purchase all the seeds in the selection will there be enough seats for everyone explain

One indicator of physical fitness is a resting pulse rate. Ten men volunteered to test an exercise device advertised on television by using it three times a week for 20 minutes and ten other similar men did not exercise.

A fireworks display is launched from a platform 10 feet above ground with an initial upward velocity of 70 feet per second.

If y/100 has to be a represented as a decimal what would it be?

The sum of three consecutive even integers is 222. find the three integers.

Donna paints ornaments for a school play. Each ornament is made up of two identical cones, as shown. How many bottles of paint does she need to paint 70 ornaments?

2 & 1/4 of bananas cost $1.89 what is the cost per pound

Solve for x. logb (x + 2) + logb x = logb 24

Korey is planning to open a comic book store. His store will cost $12,500 to open and will come with a $8,000 total annual operational cost.