2 years ago

Kira plans to buy a used van that costs $14,000. The dealer requires a 20% down payment. The rest of the cost is

Mathematics

1 answer:

VashaNatasha [74]2 years ago

8 0

A: 2800

B: 11200

C: 250.39 per month

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the absolute value of a number is the distance from 0 to the number on a number line. use absolute value notation to indicate tw

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Answer: It is 3 and negative -3

Step-by-step explanation:3 units away from zero forwards and back are both 3 but one is negative

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3 years ago

1)A student earned a grade of 80% on a math test that had 60 problems. How many

FrozenT [24]

Answer:

Step-by-step explanation:

80% = .8

60 x .8 = 48

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3 years ago

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To practice for a competition, Kate swam 710 meters in the pool each day for 3 weeks. How many kilometers did Kate swim in those

gayaneshka [121]

Answer:

14910 meters

Step-by-step explanation:

3 weeks= 21 days

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2 years ago

A nutrition company is marketing a low calorie snack brownie. A serving size of the snack is 3 brownies and has a total of 50 ca

lozanna [386]

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350 calories

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divide 50 by 3 then multiply that number by 21.

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3 years ago

Plutonium-240 decays according to the function L where o

PIT_PIT [208]

Answer:

$\boxed{\textbf{1700 yr}}$

Step-by-step explanation:

$-\dfrac{\text{d}L}{\text{d}t} = kL\\\\\dfrac{dL}{L}=-kdt\\\\\ln L = -kt + C\\\text{At t = 0, L = L$_{0}$, so C = $\ln L_{0}$}\\\ln L = -kt + \ln L_{0}\\\ln L_{0} - \ln L = kt\\\\\ln \dfrac{L_{0}}{L} =kt$

Data:

L₀ = 24 g

L = 20 g

k = 0.000 11 yr⁻¹

Calculation:

$\ln \dfrac{24}{20} =0.000 11t\\\\\ln 1.2 = 0.000 11t\\\\0.1823 = 0.000 11t\\\\t = \dfrac{0.1823}{0.000 11} = \textbf{1700 yr}\\\\\text{It will take } \boxed{\textbf{1700 yr}}\text{ for the polonium to decay to 20 g}$

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3 years ago