Heather's father gives her a jar
of pennies. she decided to add
3 pennies to the jar every day.
after 10 days, she counted
462 pennies in all. how many pennies
were in the jar before heather began
adding pennies?

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x