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enot [183]
3 years ago
14

Hello! Can someone help with this question?

Mathematics
1 answer:
IgorC [24]3 years ago
5 0

Hello! :)

\large\boxed{\text{70 seconds}}

Use a proportion to find how many seconds are needed to fold 5 shirts.

We are given that he takes 28 seconds to fold 2 shirts:

28 sec : 2 shirts

We are not given the amount of time needed for 5 shirts, which we need to solve:

x seconds : 5 shirts

Express in a fraction:

\frac{2 shirts}{28 seconds}  = \frac{5 shirts}{xseconds}

Cross multiply and simplify:

2 * x = 5 * 28\\\\2x = 140\\\\x = 70 sec

Therefore, he needs 70 seconds to fold 5 shirts.

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Shalnov [3]

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3*∑ (1/2)^n = 6

Step-by-step explanation:

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In our case, we can rewrite our summation as:

3*∑ (1/2)^n

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You can see that i changed the limits for n, this does not really matter because we are summing between a number and infinity, the only thing you need to take care is that now the power is n, instead of (n - 1)

Then we have r = (1/2) which is clearly smaller than 1.

then (1/2)

Then this summation is equal to:

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PLEASEE HELP WILL GIVE 100 POINTS AND WILL MARK BRAINLY!
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I’m pretty sure it’s b because they are camouflaged
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