Answer:
It is c = kt.
Step-by-step explanation:
This is direct variation . As the time increases the number of cranes increases.
The equation is c = kt where k is the constant of variation. In this case it will be a positive value because c is increasing with time.
If they make 20 cranes in 10 minutes then we can find the value of k by plugging in these values;
20 = k * 10
g = 20/10
k = 2.
So they make 2 cranes per minute.
Answer: $9.
Step-by-step explanation:
It is given that,
Regular price of a new chair = $75.00
This week the chair will be on sale at a 12% discount. So,
Rate of discount = 12%
We need to find the amount of money that will Jessica save if she buys the chair this week.



Therefore, Jessica will save $9 if she buys the chair this week.
Answer:
21 minutes
Step-by-step explanation:
Given the following :
Taking CITY STREET:
Time taken to drive to nearest bowling alley = 45 minutes = 45/60 = 0.75 hours
Speed of travel = 30 miles per hour
Taking FREEWAY:
speed of travel = 65miles per hour
If the distance to bowling alley is the same along both routes, The time taken along FREEWAY will be :
.
Distance to bowling alley taking city center :
Speed = distance / time
30 mph = distance / 0.75 hour
Distance = 30 × 0. 75 = 22.5 miles
Since distance is the same :
Time taken along FREEWAY :
Time taken = distance / speed
Time taken = 22.5 / 65 = 0.3461538 hour
Converting to minutes :
0.3461538 × 60 = 20.769 minutes
= 21 minutes ( to the nearest minute)
Answer:
(11.76, 12.84)
Step-by-step explanation:
Given that we can assume that the distribution of individual student enrollment units at this college is approximately normal.
Sample mean =12.3
sample std dev s = 1.9 units
Sample size = 47
Std error = 
Z critical value for 95% = 1.96
Margin of error = 
Confidence interval =

=(11.76, 12.84)