The mass of a an atom of helium is 6.65 x 10^-24. Use scientific notation to express the mass of 250 helium atoms.

A) 1.6625 x 10-21

B) 1.6625 x 10-22

C) 1.6625 x 10-24

D) 1.6625 x 10-26

Ellen purchased two binders for $1.25 each, two binders for $3.75 each, two packs of paper for $1.50 each, four packs of pens for $1.75 each, and four packs of pencils for $2.25 each.

Find the measure≤7 = 110 why is wrong?

A (-3, 5), B (1, 4), and C (-1, 0). In the box below, tell whether or not the triangle is a right triangle. Explain how you arrived at your answer.

Let's say we have two similar shapes. We'll call them Shape 1 and Shape 2. Shape 1 have the following characteristics: P1 = 22 m, A1 = 24 sq. m. We also know that Shape 2 has an area of 600 sq. m. What is the perimeter of Shape 2?

A circle has its center at the center of a square with 6-inch sides. Find the area of the square not covered by the circle. Round the answer to the nearest tenth.

What value of x marked the equation 9^5x9^7=9x

Enlarge and Kate played basketball last year.

30% of middle school kids are walkers. If there are 120 middle school kids how many of them are walkers.

Find the radius of a circle that has an area of 1,256 ft2

There are 11 candidates for homecoming king and 12 candidates for homecoming queen. How many possible outcomes are there for homecoming king and queen? 156, 182, 132, 210?