For a school project, Jennifer studied
runners in a 10,000-meter (10K) race.
She recorded each runner's time in her
notebook. She found that the typical
runner finished the race in 50 minutes.
The time taken by those who won the
races and those who simply ran to
keep themselves in shape were quite
different.

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!