The half-life of a radioactive kind of lanthanum is 93 minutes. How much will be left after 279 minutes, if you start with 2,064 grams of it?

How many different 7 place license plates are possible when 3 of the entries are letters and 4 are digits?

A landscape architect is planning a new nature in the middle of an urban campus. she wants the length to be twice the width and wants to put a 3foot high retaining wall around the perimeter. there will be 300 total feet of wall installed.

A 152 cm tall barrel has a circumference of 56.52. What is the volume of the barrel using the formula for the volume of a cylinder as an estimate? Use 3.14 for the value of π. Note V=πr^2h. __cm^3

True or False: The area of a rectangle with one side of 7 yds and a diagonal of 25 yards is 168 sq yds

Does (0, 0) make the equation y = x true? Yes or No

Which best describes how to solve this equation for x? x/a=b

Subtract the equations. 5x + 4y = 25 (5x + 2y = 3)

4 times what number equals 204

Solve for p. 2 (p + 1) = 24 What is the answer? A 11 B 11.5 C 12.5 D 13

What is 10000+7891287