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Kruka [31]
3 years ago
15

A submarine hovers at 66 2/3 yards below sea level. if it ascends 24 1/8 yards and then decends 78 3/4 yards, what is the submar

ines new position, in yards, with respect to sea level?
-169 13/24
-121 7/24
-12 1/23
12 1/24
Mathematics
2 answers:
UNO [17]3 years ago
8 0

Answer:

-121 7/24

Step-by-step explanation:

alekssr [168]3 years ago
3 0
The answer to this question for you is -121 7/24
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Answer:

It takes at least 7 months for the cat to be at least 6 kg lighter than the original weight.

Step-by-step explanation:

Use exponential decay formula:

A = P (1-r)t

A = amount decreased to

P = original amount

r = rate of decrease

t = time

 

6 ≥ 12 (1-0.10)t      divide both sides by 12

0.5 ≥ (0.9)t            take log of both sides

log (0.5) ≥ log (0.9)t     power rule of logs lets the exponent t drop to front of log to become a factor

log (0.5) ≥ t log(0.9)     divide both sides by log(0.9) which is negative so reverse the inequality sign

log (0.5) / log (0.9) ≤ t     use calculator

6.57 ≤ t

 

It takes at least 7 months for the cat to be at least 6 kg lighter that original weight.

 

check:

12 (0.9)7≈ 5.73

12 (0.9)6 ≈ 6.37

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