Answer:
84,375 m^2
Step-by-step explanation:
We need to find the surface area of the pyramid. The pyramid can be divided into 4 triangles and one square (the bottom).
Area of a triangle is 1/2*b*h where b is the base of the triangle and h is the height.
Area of a square is length times width.
Total area = 
I would say 60 degrees because the shape that has x is just a bigger version of the original so it would have the same angels so x is 60 degrees
Answer:
The two ratios are equivalent.
Step-by-step explanation:
Reduce both fractions:
6/21 = 2/7 [Take out 3 from both sides]
8/28 = 2/7 [Take out 4 from both sides]
2/7 = 2/7
The answer to your question is 45 miles / 1 hour * 5280 feet / 1 mile * 1 hour / 3660 seconds =
45 * 5280 * 1 / 1 * 1 * 3660 =
2737600 feet / 3660 second =
64.918
Answer:
65.04<x<68.96
Step-by-step explanation:
The confidence interval formula is expressed as;
CI = x ± z*s/√n
x is the mean = 67
z is the 95% z score = 1.96
s is the standard deviation = 8
n is the sample size = 64
Substitute;
CI = 67 ± 1.96*8/√64
CI = 67 ± 1.96*8/8
CI = 67 ± 1.96
CI = (67-1.96, 67+1.96)
CI = (65.04, 68.96)
Hence the confidence interval for the mean of the population is between 65.04<x<68.96
