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3 years ago

Pls help me with this

Mathematics

1 answer:

Black_prince [1.1K]3 years ago

4 0

Answer:

71°

Step-by-step explanation:

The temperature had to be at least 71° when the heater quit to be able to lose 4° and still be at least 67° when the heater is repaired.

Question is...how did someone know that the heater had failed?

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You want $5000 4 years from nowfor a down payment for a car. How much money must be deposited monetly into an account earning 4.

timama [110]

Answer:

$95.5090 must be deposited monthly

Step-by-step explanation:

From the information given:

The annual interest rate (r) = 4.2% = 0.042

Let assume that an amount Y is deposited, then after one month, it will increase to:

$Y ( 1+ \dfrac{0.042}{12})$

The total amount after 4 years will be:

$= Y ( 1+ \dfrac{0.042}{12})^{48}+Y ( 1+ \dfrac{0.042}{12})^{47} +Y ( 1+ \dfrac{0.042}{12})^{46} +...+ Y ( 1+ \dfrac{0.042}{12})$

$= Y ( 1.0035)^{48}+Y ( 1.0035)^{47} +Y( 1.0035)^{46} +...+ Y( 1.0035)$

Using the sum of a geometric progression:

$= Y (1.0035) \dfrac{ (1.0035^{48}-1)}{(1.0035-1)}$

$= Y (1.0035) \dfrac{ (1.0035^{48}-1)}{0.0035}$

The above amount is then equal to $5000

i.e

$= Y (1.0035) \dfrac{ (1.0035^{48}-1)}{0.0035} = 5000$

$Y = \dfrac{5000\times 0.0035}{(1.0035)(1.0035^{48}-1)} \\ \\ \mathbf{Y = \$95.5090}$

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3 years ago

58 percent of what is 61.4

Nana76 [90]

Answer:

35.612

Step-by-step explanation:

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3 years ago

The opposite sides of a parallelogram are always sometimes or never congruent

KengaRu [80]

Always congruent due to the way the shape is built

6 0

3 years ago

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6. A triangular sail has a base length of 2.5 meters. The area of theis 3.75 square meters. How tall is the sail?

Tom [10]

The sail is 3 meters tall

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3 years ago

Mathematics with applications in the management, Natural, and Social Sciences Twelfth edition

Fiesta28 [93]

Answer: 2014

Step-by-step explanation:

LED: -25x + 6y = 20

CFL: 15x + 2y = 322

we need to find which year it was the same to know where LED lighting surpassed CFL lighting

-25x + 6y = 20

15x + 2y = 322 (-3)

-25x + 6y = 20

-70x = -946

x = 13.51

The nearest year would be 14 which is 2014

8 0

3 years ago