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Elena-2011 [213]
3 years ago
6

10

Mathematics
1 answer:
Zigmanuir [339]3 years ago
3 0

Answer:

320

Step-by-step explanation:

distance=speed*time= 8 *40.

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Simplify The expression Try This question out and I’ll give you brainliest
arlik [135]

Answer:

√80=16√5

2√45

2×9√5

18√5

16√5-18√5

-2√5

hope that helps -2√5

3 0
3 years ago
What is the volume of the pyramid?
Vedmedyk [2.9K]
Volume of the pyramid would be 48m3
8 0
3 years ago
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Suppose a cold beer at 40°F is placed into a warm room at 70°F. Suppose 10 minutes later, the temperature of the beer is 48°F. U
Yuri [45]

Answer:

69.92°F

Step-by-step explanation:

Given:

Initial temperature ( i.e at time, t = 0) = 40°F

Temperature of the room = 70°F

Temperature after 10 minutes ( i.e at time t = 10 ) = 48°F

Now, from Newton's law of cooling

T'(t) = k(A - T(t))

T(t) temperature after time t

T'(t) = \frac{\textup{dT}}{\textup{dt}}

here, A is the room temperature

thus,

\frac{\textup{dT}}{\textup{dt}}  = k(70 - T)

or

\frac{\textup{dT}}{\textup{70-T}} = kdt

on solving the differential equation, we get

T = 70-C^{-kt} ............(1)

Now from the boundary conditions,

 i.e at time, t = 0; T = 40°F

we get,

40 = 70-C^{-k\times0}

or

C = 30

and,

at time, t = 10; T = 48°F

thus,

48 = 70-30^{-k\times10}

or

k = \frac{\textup{-1}}{\textup{10}}ln\frac{11}{15}

or

k = 0.03

Therefore,

for t = 25

from 1 we have

T = 70-30^{-0.03\times25}

or

T = 70 - 0.0780

or

T = 69.92°F

3 0
3 years ago
Find the slope of the line whose equation is 17 + 3y = 7x.-7/317/3
Anastaziya [24]

Slope is 7/3

Step-by-step explanation:

  • Step 1: The equation of the line is 17 + 3y = 7x. Find the slope.

Slope intercept form is y = mx + b, where m is the slope.

⇒ 17 + 3y = 7x

⇒ 3y = 7x - 17

⇒ y = 7/3 x - 17/3

m = 7/3

⇒ Slope is 7/3

4 0
3 years ago
Which of the following is a solution to 4cos2x − 1 = 0?
cricket20 [7]

Answer:

A. 60*

Step-by-step explanation:

I used the website M A T H W A Y . C O M

and I remember learning this in my school, I worked this problem by hand and am confident that A is the correct answer.

4 0
3 years ago
Read 2 more answers
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