Y = 40 + 4m
m = minutes
y = total papers graded
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➷ M = k x r^2
Substitute in the values:
14 = k x 2^2
Divide both sides by 2^2 to find k:
k = 3.5
Substitute the new values in:
224 = 3.5 x r^2
Divide both sides by 3.5 to find r^2
r^2 = 64
Square root it:
r = 8
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Jiri age = 43
Pamela age = 52
52 - 43 = 9
52 + 43 = 95
Total area of rectangular wall = 8ft * 15ft = 120 ft²
Each window area = 3ft *4ft = 12 ft²
For the three windows = 3 * 12 = 36 ft²
Area that must be painted = 120ft² - 36ft² = 84 ft²
Answer:
3 cm
Step-by-step explanation:
