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anonymous
 one year ago
1. Find the sum of the geometric sequence –3, 15, –75, 375, … when there are 8 terms and select the correct answer below.
–195,312
195,312
292,968
–292,968
anonymous
 one year ago
1. Find the sum of the geometric sequence –3, 15, –75, 375, … when there are 8 terms and select the correct answer below. –195,312 195,312 292,968 –292,968

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freckles
 one year ago
Best ResponseYou've already chosen the best response.1you can add the 8 terms up like it is or you can use a formula if you wish

anonymous
 one year ago
Best ResponseYou've already chosen the best response.02. Finn bought a yoyo from a company that claims that, with each retraction, the string rolls up by 80% of the original length. He sets up a tape measure and throws the yoyo 3 times. His data are charted below. Throw Length of string (feet) 1 3 2 2.4 3 1.92 Finn wants to find the sum of the length of string after 10 throws. What is the sum of the lengths, rounded to the nearest hundredth? 13.39 feet 15.00 feet 4.46 feet 0.40 foot 3. Evaluate S5 for 300 + 150 + 75 + … and select the correct answer below. 18.75 93.75 581.25 145.3125

freckles
 one year ago
Best ResponseYou've already chosen the best response.1\[S_n=\frac{a_1(1r^n)}{1r} \\ \text{ where} n=8 \text{ since you want to find the sum of the first 8 terms }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@freckles just add the terms that's it?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@freckles or did you mean multiply?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1you are to find the sum not the product

freckles
 one year ago
Best ResponseYou've already chosen the best response.1you have to find the other 4 terms though if you do it that way

freckles
 one year ago
Best ResponseYou've already chosen the best response.1but I would just use the formula because it is quicker to me
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