If lindsay completed 4/5 of the race in 3 hours how long will it take her to complete the entire race ​

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

Can someone show me step by step how to do this?

Consider the enlargement of the pentagon. what is the value of x, rounded to the nearest tenth? 2.1 centimeters 3.3 centimeters 7.0 centimeters 15.0 centimeters