If the sun is 70 percent above the horizon find the lenghth of the shadow cast by a building 90 feet talk round your answer to the nearest tenth

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Solve the system of equations. y= 2x y= x^2 - 15

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.