Mr browner has 7 keys, one for his home 2 for his car and the rest are for his drawers in his office. if he picks up 1 without looking what is the probability it is for his car 1/7, 2/7, 3/7, 4/7, 5/7, 6/7

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

Astudent was asked to find the square of 7x+3. the student quickly wrote (7x+3)^3= 49x^2+9. identify the student's error and provide the correct answer.