ANSWER
EXPLANATION
The area of the original rectangle is 72 in².
If the length and the width of the rectangle are changed by a scale factor of 3.5.
Then the area will change by
To get the area of the new rectangle is we multiply the area of the original rectangle by 12.25.
This implies that,the area of the new rectangle is
Therefore the area of the new rectangle is 882 square inches.
Answer:
54.80 MPa to 55.92 MPa
Step-by-step explanation:
Sample mean fracture strength (x) = 55.36 MPa
Sample standard deviation (s) = 3.99 MPa
Sample size (n) = 196.
The upper and lower bounds for a 95% confidence interval are given by:
The upper and lower bounds of the confidence interval are;
The 95% confidence interval for true average fracture strength is 54.80 MPa to 55.92 MPa
A^2 + b^2 = c^2
12^2 + 17^2 = 485
so c^2=485
so c=22.0 inches
Amount of interest = 3/100 x 1200
= $36
Answer is B
