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Serga [27]
3 years ago
15

Find the first term and common ratio for the geometric sequence a2 =2.5,a4=62.5

Mathematics
1 answer:
fenix001 [56]3 years ago
6 0

Answer:

a1 = 0.5; common ratio = 5

Step-by-step explanation:

Let the common ratio = r

a2 = 2.5

a3 = 2.5r

a4 = 2.5r * r = 2.5r^2

We are told a4 = 62.5, so

2.5r^2 = 62.5

Divide both sides by 2.5

r^2 = 25

r = 5

a2 = a1 * r

a1 = a2/r = 2.5/5 = 0.5

Answer: a1 = 0.5; common ratio = 5

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An employee worked 36 hours last week. This week, she worked 48 hours. Find the percent increase. Round to the nearest percent.
Ratling [72]

Answer:

To the nearest percentage, percent increase is 33%

Step-by-step explanation:

Mathematically;

Percentage increase = (new - old)/old * 100%

new = 48 hours

old = 36 hours

% increase = (48-36)/36 * 100%

12/36 * 100%

1/3 * 100%

= 33.33%

6 0
3 years ago
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kkurt [141]

Answer:

13.5

Step-by-step explanation:

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3 years ago
What is 7√27+5√48 in simplified radical form?
Andreyy89
7√27 + 5√48

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hope this helps, God bless!
3 0
4 years ago
Is 3.5 > or < or equal to 1/2
Sloan [31]
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4 years ago
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