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3 years ago

Pls Help me on this standar!

Mathematics

1 answer:

____ [38]3 years ago

3 0

1,400

Step-by-step explanation:

it's my best estimated answer

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The diagonal of a cube is 28 cm. Identify the length of an edge. Round to the nearest tenth, if necessary. HELP PLEASE!!

makkiz [27]

Answer:

$16.2\ cm$

Step-by-step explanation:

we know that

The diagonal of a cube is equal to

$D=b\sqrt{3}$

where

b is the length of an edge of the cube

we have

$D=28\ cm$

substitute

$28=b\sqrt{3}$

$b=28/\sqrt{3}=16.2\ cm$

8 0

3 years ago

the function h=-16t^2+48t represents the height h (in feet) of a kickball t seconds after it is kicked from the ground

Julli [10]

Answer:

36 feet

Step-by-step explanation:

Given

$h(t) = -16t^2 + 48t$

Required

Determine the maximum height attained

First, calculate the time to reach maximum height;

In a quadratic equation;

$y = ax^2 + bx + c$

The maximum is:

$x = -\frac{b}{2a}$

So, we have:

$t = -\frac{b}{2a}$

Where

$a = -16; b = 48$

So:

$t = -\frac{b}{2a}$

$t = -\frac{48}{2 * -16}$

$t = -\frac{48}{-32}$

$t = \frac{48}{32}$

$t = 1.5$

The maximum height is at: $t = 1.5$

So, we have:

$h(t) = -16t^2 + 48t$

$h_{max}=-16 * 1.5^2 + 48 * 1.5$

$h_{max}=36$

6 0

3 years ago

What is the value of the function f(x)= -x+4 when x= -2? A) 6 B) -6 C) -2 D) 2

schepotkina [342]

F(x) = -x + 4

Substitute x = -2 to the equation:

f(-2) = -(-2) + 4 = 2 + 4 = 6

Answer: A) 6

7 0

3 years ago

Read 2 more answers

Create an equation

Gala2k [10]

answer:

54 students

since 7 students left,

331 - 7 = 324

324 / 6 = 54 students

4 0

3 years ago

What is the volume of a hemisphere with a radius of 2.1 m, rounded to the nearest tenth of a cubic meter?

Art [367]

Answer:

The volume of hemisphere is 19.4 cubic meter.

Step-by-step explanation:

Given:

A hemisphere is with a radius of 2.1 m.

Now, to find the hemisphere volume with radius 2.1 m.

$Radius\ (r) = 2.1 m.$

So, we put formula to get the volume of hemisphere:

$Volume=\frac{2}{3} \pi r^3\ \ \ \ \ (Taking\ the\ value\ of\ \pi =3.14)\\\\Volume=\frac{2}{3} \times 3.14\times 2.1^3\\\\Volume=\frac{2}{3} \times 3.14\times 9.26\\\\Volume=19.384\ cubic\ meter.$

Hence, the rounded to the nearest tenth of a cubic meter is 19.4 cubic meter.

Therefore, the volume of hemisphere is 19.4 cubic meter.

3 0

3 years ago