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

You watch x minutes of televisión on monday and the same minutes on wednesday, and 30 minutos on friday

Juan is making birdhouses to sell at a craft show. the cost of making the birdhouses is $80 plus $6.25 per birdhouse. he will sell them for $16 each. write and solve an inequality to find the number of birdhouses he must sell to make a profit.

What is a division question

Which of the following rain-related losses WOULD be covered under this renters insurance policy? a. Your laptop is ruined because you left your window open during a moderate rain shower b.

What is the sum of the geometric series in which a1 = 3, r = 2, and an = 192? Hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1,

Birthweights at a local hospital have a normal distribution with a mean of 110 oz. and a standard deviation of 15 oz. what z-value corresponds to a birthweight of 138 oz.? (round your answer to the nearest hundredth.)

For every 24 minutes of television, there are 6 minutes of commercials. how many minutes of commecials are in 1 hour and 36 minutes of television?

There is a red, a green, and a yellow bulletin board hanging in the hallway. All of the bulletin boards are rectangular with a height of 4 feet. Their lengths are 6 feet, 5 feet, and 3 feet.

What is the equation of a line that is parallel to y=5/6x-10 and passes through (12, 8) ? Enter your answer in the box.

And earthquake wave travels through 55 km of rock in 25 seconds. Write a equation to represent the relationship between t, the number of seconds, and d, the total distance the wave travels.