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Stolb23 [73]
3 years ago
7

Samuel can type nearly 40 words per minute. Use this information to find the number of hours it would take him to type 2.2 × 105

words.
Mathematics
1 answer:
Dafna1 [17]3 years ago
3 0
I believe the answer is .09625 hours

Explanation: first you do 2.2 x 105= 231
Then you do 231/40=5.775 to get how many minutes it takes to type 231 words. Then u divide 5.775/60 to get how many hours it would take.
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In general the binomial expansion is


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So in our case, because we want ascending powers of x we'll write,


(-3x + 1)^{11} =  {11 \choose 0} (-3x)^0 1^{11} + {11 \choose 1} (-3x)^{1} 1^{10} + {11 \choose 2} (-3x)^{2} 1^9  + {11 \choose 3 } (-3x)^3 1^8 + ...


We need to calculate the binomial coefficients:


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