The radius of a circle is 7 centimeters. What is the circle's area

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

The value √10 and √15 are plotted on the number line

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80