Answer: 7
Step-by-step explanation:
if Martha jarred 6 liters of jam in 2 days,
she will jarred 3 litters of jam in one day
for 21 litters she will need 7 days
21/3=7
a(n) = 6n - 7
a(12) = 6(12) - 7
a(12) = 72 - 7
a(12) = 65
The answer is B.
Answer:
50
Step-by-step explanation:
Adding up 20, 30, 40, 50, 60, 70, 80, we get 350. There are 7 numbers in this set, so divide this 350 by 7. We obtain the mean, 350/7 = 50 (Answer B)
Answer:
40 persons
Step-by-step explanation:
Data provided :
The power put out by a single person = 100 W
Power required by an electric clothes dryer = 4.00 kW = 4000 W
Thus,
The number of persons required to produce 4000 W of power
= ( Power required ) / ( power produced per person )
or
= (4000 W) / (100 W/ person)
or
= 40 persons
Hence, the number of persons required is 40
