9514 1404 393
Answer:
150 Wh
Step-by-step explanation:
We know the energy per bulb is 10 Wh per hour, so the total energy used by 3 bulbs in 5 hours is ...
(10 Wh/(bulb·hour))×(3 bulbs)×(5 hours) = 10·3·5 Wh = 150 Wh
Answer:
b
Step-by-step explanation:
i took the test
Seven hundred and and eighty thousand
First you find the median, the middle term (if there are an even number of terms it is the average of the middle two terms.) Since you have 21 terms, odd, you just use the middle term, in this case 8. The first quartile works the same way, but just on the left half between the start and the median...so the first quartile is 6.
Multiplying and dividing integers with the same sign and different signs.
When multiplying and dividing with the same sign, the answer will always be positive.
6/3 = 2
-6*-3=18 (Two negatives make a positive)
-4/-2=2 (This is because there are two -2s in -4, so the answer will always be positive- also two negatives make a positive.)
When multiplying and dividing by different signs, the answer will always be negative.
3*-6= -18
4/-2 = -2
Because the answer will always by negative, you can multiply or divide normally and then just add the negative sign (-) in front of the answer.
