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3 years ago

12

if a car drives 80 miles in 1 hours how many miles will the car travel in 30 minutes at this rate? how many miles will it travel

in 45 minutes?

1 answer:

eimsori [14]3 years ago

4 0

40 miles in 30 minutes, 60 miles in 45 minutes

divide 80 by 60 (mins in a hour) then multiply that’s by the number of minutes (30,45)

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stepladder [879]

Answer:

471ft^3

Step-by-step explanation:

5^2 x 6 x 3.14

25 x 6 = 150

150 x 3.14 = 471

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3 years ago

If f(x) - 4x2-3 and g(x) = x+1, find (f - g)(x).

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4x^2-x-4

Step-by-step explanation:

f(x) = 4x^2-3 and g(x) = x+1,

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Distribute the minus sign

=4x^2-3 - x-1

Combine like terms

=4x^2-x-4

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2 years ago

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Find the total surface area of this cone

Eddi Din [679]

Answer:

Step-by-step explanation:

3.14*10*(10+24^2+10^2 squared)

31.4*5870 squared

31.4*76.62

240.5554

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5 0

2 years ago

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

Pia needs 100 red beads to make a necklace. She already has 38 red beads. How many more beads does she need?

Nutka1998 [239]

Answer:

at least a couple

Step-by-step explanation:

she should probably buy some more

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3 years ago

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