Ann made a 33-step staircase using 18 toothpicks as shown in the figure. How many toothpicks does she need to add to complete a 55-step staircase?

A probability forecast that calls for a "40 percent chance of rain" means that

A culture started with 2000 bacteria. after 8 hours, it grew to 2400 bacteria. predict how many bacteria will be present after 19 hours.

A student estimated a mass to be 325g but upon carefully measuring it found the actual mass to be 342g what is the percent error?

Find the volume for a regular pentagonal prism with sides of 10 feet and a height of 7 feet. * 1605.8 cubic feet 1204.3 cubic feet O None of these 70 cubic feet O 303.1 cubic feet

How Many L/min are in 105.6 L/h

Dan had 175 dollars to spend on 6 books. After buying them he had 13 dollars. How much did each book cost?

Angle I measured 20 degrees, side HI = 5, angle L = 20 degrees, and side KL = 5. What additional information would you need to prove that triangle HIJ is congruent to triangle KLM by SAS

In the barn, there are horses and chickens. There are 11 heads and 32 legs altogether. How many chickens are there? A. 6 B. 5 C. 4 D. 3

What is 5.9 as a mixed number and a improper fraction?

9 x 1/4 = 2 1/4 what is the improper fraction