The Johnson family is taking a car trip. They are driving at an average speed of 60 miles per hour. The graph shows their distan
2 answers:
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Answer: Josh borrowed $ 876 to buy the computer.
Step-by-step explanation:
Formula for simple interest : I = Prt
, where P = principal amount
r= rate of interest ( in decimal)
t=time (in years)
Total amount with simple interest to pay : A = P+I
⇒ A = P +Prt
⇒ A = P(1 +rt) (i)
As per given , A = $1,244.34
r= 12.4% = 0.124
t= 3 years
Now, put these values in (i) , we get
Hence, Josh borrowed $ 876 to buy the computer.
Answer:
The mean apple weight is different from 8oz
Step-by-step explanation:
Claim : An apple farm claims that the average weight of all their apples is 8oz.
n = 20
Standard deviation =s = 0.95
Since n < 30
So we will use t-test
x = 7.77
Substitute the values :
Since we are not given the significance level
So, we will take 5%
So,α = 0.05
Degree of freedom = df = n-1 = 20-1 = 19
So, using t table
Since t critical > t statistic
So, we accept the null hypothesis.
So, The mean apple weight is different from 8oz