On the Monday described above, Lopez sold 12 barrels of oil. He did this to avoid losing more money, just in case the price continued to drop. Which value represents the value of 12 barrels of oil?
-$420
-$360
-$42
-$12
$42
$360
$3600

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?