Answer: 10
Step-by-step explanation: A: 4×10^−3=0.004
B: 4×10^−4=0.0004
If 9 of the sparrows is 45% of the birds in the backyard, 9/x = 45/100.
Cross multiply to get 9 * 100 = 45x; simplified is 900 = 45x or 20.
This means that there are 20 birds in the backyard. You can check this by dividing 9/20 which equals 45%
Answer:
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Step-by-step explanation:
a=10
b=pi/12
d=10cos(pi/12t)
t=6
d=5