Im having a really hard time.
a science museum has a spherical model of the earth with a diameter of 8.5 m. what is the volume of the model? use 3.14 for pi and round your answer to the nearest whole number. show your work.

Which number produces a rationale number when multiplied by 1/5

Jamie went to home depot. she bought 25 bags of soil that cost $9 per bag. she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each. she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jame pay at the end?

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)