Bobby wonders if he randomly guesses on four true-false questions, how would he do on the assessment? he creates the simulation below. he states that if the coin lands on heads, the answer will be correct, and if the coin lands on tails, the answer will be incorrect

Ben frank is an electrician who installs lighting fixtures. he charges (in dollars) his clients 15h+40f15h+40f where hh is the number of hours worked and ff is the number of fixtures installed. how much does ben frank charge when he works 77 hours and installs 99 fixtures?