Answer:
78.46
Step-by-step explanation:
Given that
Pop. Standard deviation = 1.61
Sample standard deviation = 2.15
Sample mean = 7.47
Sample size = 45
Recall that
Test stat for chi square
= (n - 1) (sample standard dev/pop standard dev)^2
= 45 - 1 (2.15/1.61)^2
= 44(1.3354)^2
= 44 × 1.78329
= 78.46
Answer:
Step-by-step explanation:
1. You must apply the following formula for calculate the total surface area the regular pyramid:
Where p is the perimeter of the base, l is the slant height and B is the area of the base.
2. The perimeter is, where s is the side length:
3. The faces are isosceles traingles. So, to find the slant height you can divide one base into two equal right triangles and calculate the slant height with Pythagorean Theorem:
4. The base is equal to any face, then both have equal areas. As previously you divide one base into two equal righ triangle to find the slant height, you can calcualte the area of one right triangle and multply it by 2 to calculate B:
Finally substitute values:
Is there any answer choices or a picture??
The equation that represents the cost of membership is $100 + $40c
The cost of 1 year membership is $580.
The number of months you have paid for is 9 months.
<h3>What is the equation that represents the cost of the gym membership?</h3>
The cost of gym membership is the sum of the fixed cost and the variable cost. The fixed cost is the start-up fee while the variable cost is the cost per month.
The equation that represents the cost of the gym membership is: c = $100 + $40m
Where m represents the number of months
The cost of 1 year membership = $100 + $40(12)
$100 + $480 = $580
How many months would $460 cover = ($460 - $100) / 40 = 9 months
To learn more about fixed cost, please check: brainly.com/question/25879561
Parentheses first: -3+1 = -2
Multiply: -2*2=-4
Subtract: -4-5=-9
Final Answer: -9