Kevin had to make 14 visits to the dentists last year to take care of his braces. each visit cost #124. how much did the visits cost in all?

Step-by-step explanation:

Let's look at simpler cases.  If there was just one visit that would be 124.  if there were two, each time he'd have to pay 124 so it's 124+124 = 248.  So this is multiplication, because next would be three, which is 124+124+124 or 124 time 3.

In total then it's 124*14.  You may usually use an x for multiplication, and if you do just keep in mind * can also be used.  or, if something is inside of parenthesis like this 124(14) or (124)14.  If you need help doing the multiplication let me know.  

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours

im not sure what this means: mc011-7.jpg

step-by-step explanation: