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2 years ago

What is the answer to 42−{(7+14)÷7}×4 Please help

Mathematics

1 answer:

Komok [63]2 years ago

3 0

Answer:

42−{(7+14)÷7}×4

42 - { 21/7} x 4

42 - 3 x 4

42 - 12

~batmans wife dun dun dun...

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Ming spent half of her weekly allowance buying pizza. To earn more money her parents let her clean the oven for $6. What is her

Gelneren [198K]

Answer:

$16

Step-by-step explanation:

she has $14 now

her parents let her earn 6

so $14 - $6 = $8

so thats what was left over from her allowance. she spent half of her allowance to get to $8 so you double the money

$8 * 2 = $16

$16 is her weekly allowance

7 0

2 years ago

If a snowball melts so that its surface area decreases at a rate of 3 cm2/min, find the rate (in cm/min) at which the diameter d

grin007 [14]

Answer:

The diameter decreases at a rate of 0.053 cm/min.

Step-by-step explanation:

Surface area of an snowball

The surface area of an snowball has the following equation:

$S_{a} = \pi d^2$

In which d is the diameter.

Implicit differentiation:

To solve this question, we differentiate the equation for the surface area implictly, in function of t. So

$\frac{dS_{a}}{dt} = 2d\pi\frac{dd}{dt}$

Surface area decreases at a rate of 3 cm2/min

This means that $\frac{dS_{a}}{dt} = -3$

Tind the rate (in cm/min) at which the diameter decreases when the diameter is 9 cm.

This is $\frac{dd}{dt}$ when $d = 9$ . So

$\frac{dS_{a}}{dt} = 2d\pi\frac{dd}{dt}$

$-3 = 2*9\pi\frac{dd}{dt}$

$\frac{dd}{dt} = -\frac{3}{18\pi}$

$\frac{dd}{dt} = -0.053$

The diameter decreases at a rate of 0.053 cm/min.

7 0

2 years ago

222.95+865+.07 +3.4 what is the answer

Leokris [45]

Answer:

the answer is:

1,092.05

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3 years ago

Can someone pls help for brainlest

Sav [38]

Answer:

The answer is 74.24 square millimeters

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2 years ago

Jamal has $15.00 to spend at the concession stand. He buys nachos for $7.50, and he wants to purchase some sour straws for $1.50

frosja888 [35]

15-7.50=7.50
7.50/1.50=?

5 0

2 years ago