Calculate the speed of a wave with a frequency of 2 Hz, amplitude of 3m, and a wavelength of 10m

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?