Nico completes 1/8of his math problems in 2/5 of an hour. At this rate how many of his math problems will he finish in one hour?

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?