Is f(x)= |x| +2 continuous at x=0 or differentiable at x=0?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

If the value of cos330°is√3/2 then find cos 165°.

If i purchase a product for $79.99 and two accessories for 9.99 and 7.00 how much will i owe after taxes applies 8.75%