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

Suppose your walking rate is 4 feet per second. write that in miles per hour

How much does a Newton equal in Kilograms?

Suppose there is a right triangle with 2 legs of 6cm and 9cm long. What is the measurement of the hypotenuse?

The Luxor hotel, in Las Vegas, is a square pyramid with lateral faces consisting of black, glassed mirrored panes. The building is 646 feet wide at the base and 350 feet high. How much glass was needed to cover the pyramid?

Round the place value on 123,499

Deanna, Amy, and Pam pick the same number of peaches at an orchard. They each set their peaches in four equal piles with6 peaches in each pile. Write a multiplication that shows how many peaches they picked

Naomi has 50 red beads and white beads. The number of red beads is 1 more than 6 times the number of white beads. How Many red beads does Naomi have?

Which one is more percise 5kg or 5212g?

Find an equation of the line that has a slope of - 1 and a y intercept of 2. Write your answer in the form y = mx + b.

The base of an exponential function can only be a positive number