The half-life of radium is 1620 year what fraction of the radium sample will remain after 3240 years

Carl is boarding a plane. He has 2 checked bags of equal weight and a backpack that weighs 4kg. The total weight of Carl's baggage is 35kg. Write an equation to find the weight of the checked bags.

How many different groups of students can show up for a seminar with an enrollment of 17?

Evaluate: a = - 3, b = 1, and c = - 4 -21 - C Type the correct answer, then press Enter. Ar

A standard piano has 88 keys. There are 52 white keys and 36 black keys. What is the ratio of white keys to black keys?

Matt's friend, Franny, found that the volume of a rectangular prism was 96 in sqaured. She remembered that the area of the base was 16 in squared. What was the height of the box? Show your work.

Jamal and tia started riding to the mall with their bicycles. The mall is 3.5 km from Jamal's house. They stopped for a drink at a park after 2.25 Km. How much farther do they have to ride to reach the mall.

Luke made a model of a solid figure with one circular base and one curved surface with solid figure did he make

A cone is inscribed in a regular square pyramid. If the pyramid has a base edge of 6" and a slant height of 9", find the volume of the cone.

Solve for x. Must be simplified 15<-5x

Simplify the following expression. (3 + 8 x) + 7 x 3 + 15 x 18 x 18 + x 11 x + 7