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3 years ago

Math question hurry i will give you brainliest

Mathematics

1 answer:

enyata [817]3 years ago

5 0

Answer:3.15 divded by 15= 0.21

2.64 dived by 12= 0.22

2.72 divod by 8 =0.34

7.68 divide by 24 =0.32

Step-by-step explanation:

You might be interested in

A student needs to make a circular cardboard piece with an area between 154 square inches and 616 square inches. The function f(

Nezavi [6.7K]

The area of the circle by definition is given by:
$f (r) = \pi * r ^ 2
$
For f (r) = 154:
$154 = \pi * r ^ 2
$
Clearing r we have:
$r ^ 2 = 154 / 3.14

 r = \sqrt{154/3.14} 

 r = 7$
For f (r) = 616:
$616 = \pi * r ^ 2$
Clearing r we have:
$r ^ 2 = 616 / 3.14 r = \sqrt{616/3.14} r = 14$
Answer:
a reasonable domain for f (r) is:
7 <r <14

3 0

3 years ago

In the triangle below, what is cos B?

Kruka [31]

Cos B = c/a

cosine is adjacent over hypotenuse.

there is an acronym for this: soh-cah-toa

soh: sine is opposite over hypotenuse
cah: cosine is adjacent over hypotenuse
toa: tangent is opposite over adjacent

7 0

4 years ago

Read 2 more answers

Answer this question please branliest going :) thanks

White raven [17]

Answer:

11/1 or 11

Step-by-step explanation:

hope this helps

3 0

3 years ago

10. Determine the open interval(s) on which the function f(x) = 12x - x^3 is increasing.

Gre4nikov [31]

Answer:

$\large\boxed{x\in(-2,\ 2)}$

Step-by-step explanation:

$f(x)=12x-x^3$

Calculate the derivative of the function:

$f'(x)=\left(12x-x^3\right)'=(12x)'-\left(x^3\right)'=12-3x^2$

Calculate the zeros of the derivative:

$f'(x)=0\Rightarrow12-3x^2=0\qquad\text{add}\ 3x^2\ \text{to both sides}\\\\3x^2=12\qquad\text{divide both sides by 3}\\\\x^2=4\to x=\pm\sqrt4\\\\x=\pm2$

Let's check the derivative sign:

$f'(x)>0\iff12-3x^2>0\qquad\text{use the distributive property}\\\\-3(x^2-4)>0\\\\-3(x^2-2^2)>0\qquad\text{use}\ a^2-b^2=(a-b)(a+b)\\\\-3(x-2)(x+2)>0\\^{\qquad x=2\qquad x=-2$

Sketch a parabola open down

(before the brackets there is the number -3 < 0)

Look at the picture.

Where the derivative is negative, the function decreases.

Where the derivative is positive, the function increases.

Therefore your answer is:

$x\in(-2,\ 2)$

3 0

4 years ago

Suppose a hurricane traveled 130 miles from point in the Atlantic Ocean to Florida coastline in 6 1/2 hours. How many miles per

Marizza181 [45]

Answer:

The hurricane traveled 260 miles per hour.

Step-by-step explanation:

Given,

Distance covered by hurricane = 130 miles

Then time = $\frac{6}{12}$ hours= $0.5$ hour

Distance=Speed*Time

Speed= $\frac{Distance}{Time}$
Speed= $\frac{130}{0.5}$

Speed=260 miles per hour

So, the hurricane traveled 260 miles per hour

8 0

1 year ago

Read 2 more answers