Elena is filling rectangular prism-shaped containers, like the one shown, with sand for a project. Elena has 1000 cubic centimeters of sand. 5 cm
4 cm
10 cm
If Elena uses all of her sand, how many containers can she fill? Enter the answer in the box.

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

∆red ≅ ∆ by rule will give brainiest if possible