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Nadya [2.5K]
3 years ago
10

Math questions need help

Mathematics
1 answer:
Alchen [17]3 years ago
5 0
14.   -0.44

15.   26.488


16.   -3.33333333333

17. <span>-5.14285714286

18. -0.12

19. Eleven 2.25 pound containers</span>
20. (a)19        (b)7.6

21.Its less than.The reason is because different seasons have different rainfall amounts.
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If a sum invested gains 10% each year how long will it be before it has doubled its<br> value?
Anika [276]

Using an exponential equation, it is found that it will be 7.3 years before the value is doubled.

The equation for an increasing <u>exponential function</u> is given by:

A(t) = A(0)(1 + r)^t

In which:

  • A(0) is the initial amount.
  • r is the growth rate, as a decimal.

In this problem:

  • Gains 10% each year, thus r = 0.1.

The doubling time is t for which A(t) = 2A(0), then:

A(t) = A(0)(1.1)^t

2A(0) = A(0)(1.1)^t

(1.1)^t = 2

\log{(1.1)^t} = \log{2}

t\log{1.1} = \log{2}

t = \frac{\log{2}}{\log{1.1}}

t = 7.3

It will be 7.3 years before the value is doubled.

A similar problem is given at brainly.com/question/23008760

4 0
3 years ago
Find the surface area of the composite figure
bogdanovich [222]

Answer:

268

Step-by-step explanation:

2(2×6+2×2+2×6) + 2(4×5+4×10+10×5) - 2(2×2)

= 56+220-8

= 268 cm²

4 0
3 years ago
Read 2 more answers
jamelle has been adding one penny to her piggy bank every day since she turned 6 years old. today she turned 10. how much money
marta [7]

Answer:

$14.60

Step-by-step explanations:

One year= 365 days.

1 year Jamelle would have collected 3.65 cents.

3.65*4=14.60

8 0
4 years ago
Christopher's construction company bought 5 bags of gravel they used 3 2/5 bags on m r.pain's driveway how many bags do they hav
lyudmila [28]
1 3/5 because 5 - 3(2/5) = 1 3/5
5 0
3 years ago
If m&lt;VST = (5x + 23) and m&lt;VUT =<br>(8x - 49), find m&lt;SVT​
tamaranim1 [39]

Answer:17

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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