Answer:
Sheet metal remaining = 4.1x
cost per square foot of sheet metal = $30
Step-by-step explanation:
Total sheet metal bought = 7.6 ft2
Total sheet metal used = 3.5 ft2
Given equation:
7.6x − 3.5x = 123
Where,
x = cost per square foot
7.6x − 3.5x
Sheet metal remaining = 4.1x
7.6x − 3.5x = 123
4.1x = 123
x = 123 / 4.1
x = $30
Cost per square foot = $30
Answer:
A
Step-by-step explanation:
sin 214 = -0.5591
tan 214 = 0.6745
cos 214 = -0.8290
Answer:
The lower confidence limit of 99% confidence interval for the mean breaking strength of the briefcases produced today would be equal to 331.09 pounds.
Step-by-step explanation:
Lower limit of confidence interval = mean - Error margin (E)
mean = 341.0 pounds
sd = 21.5 pounds
n = 35
degree of freedom = n - 1 = 35 - 1 = 34
confidence level = 99%
t-value corresponding to 34 degrees of freedom and 99% confidence level is 2.728
E = t × sd/√n = 2.728 × 21.5/√35 = 9.91 pounds
Lower limit = 341.0 - 9.91 = 331.09 pounds
