The answer should be d
64pi=4pir^2
cancel the pi
64=4r^2
16=r^2
r=4
Answer:
B: -18 ÷ 3
Step-by-step explanation:
-18 because 1/4 is closer to 18
3 because 2/3 is closer to 3 than 2
Hope This helps! (Edgenunity Sucks!)
1 hundredth is equal to 0.01 therefore 20 hundredths is equal to 0.2. 1
thousandth is equal to 0.001 therefore 2 thousandths is equal to 0.002.
Clearly these are not equivalent.
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26 1/4 ft between the park bench and fountain
Step-by-step explanation:
Frequency of a mass-spring system is:
f = √(k/m) / (2π)
Given f = 2/π Hz and m = 20 kg:
2/π Hz = √(k / 20 kg) / (2π)
4 Hz = √(k / 20 kg)
16 s⁻² = k / 20 kg
k = 320 kg/s²
k = 320 N/m
If the 20 kg mass is replaced with an 80 kg mass, the frequency is:
f = √(320 kg/s² / 80 kg) / (2π)
f = √(4 s⁻²) / (2π)
f = 2 Hz / (2π)
f = 1/π Hz
