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2 years ago

10

Two twin sisters are away at college. They both called home today. Tara calls home every 4 days. Sara calls home every 3 days. H

ow many days will it be until Tara and Sara both call home on the same day again? (answer only write that number)

1 answer:

frozen [14]2 years ago

7 0

Answer:

12

Step-by-step explanation:

4*3

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In a GP the second and fourth terms are 0.04 and I respectively find the common ratio and the first term

Reptile [31]

Answer:

common ratio=0.5, a1= 0.08

Step-by-step explanation:

r=a3/a2

r=a4/a3

compare both we get:

a3/a2=a4/a3

subtitute a2=0.04 and a4=1

a3/0.04=1/a3

(a3)^2=0.04*1

(a3)^2=0.04

taking square root in both sides

a3=0.02

For r, r=a3/a2

subtitute a3 and a2 above

r=0.02/0.04

r=0.5 common ratio

For a1

r=a2/a1

0.5=0.04/a1

a1=0.04/0.5

a1=0.08

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