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2 years ago

A button machine produces one button in 0.15 seconds. How many buttons are produced in 48.6 seconds?

2 answers:

6 0

7 because if you multiply 48.6 times 0.15 then you would have 7.29 but you have to round down because there’s no half a button

Likurg_2 [28]2 years ago

5 0

Answer: 324 buttons

Step-by-step explanation:

1 button in 0.15 seconds = x buttons in 48.6 second d

1 / 0.15 = x / 48.6 (cross multiplication )

48.6/0.15 = 324

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What value of x makes this equation true <br> 2x+8=3x+4

Alona [7]

Answer:

2x4=8

8+8=16

3×4=12

12+4=16

3 0

3 years ago

) The density of oil in a circular oil slick on the surface of the ocean at a distance of r meters from the center of the slick

Feliz [49]

Answer:

Therefore the mass of the of the oil is 409.59 kg.

Step-by-step explanation:

Let us consider a circular disk. The inner radius of the disk be r and the outer diameter of the disk be (r+Δr).

The area of the disk

=The area of the outer circle - The area of the inner circle

= $\pi (r+\triangle r)^2- \pi r^2$

$=\pi [r^2+2r\triangle r+(\triangle r)^2-r^2]$

$=\pi [2r\triangle r+(\triangle r)^2]$

Since (Δr)² is very small, So it is ignorable.

∴ $A=2\pi r\triangle r$

The density $\delta (r)= \frac{40}{1+r^2}$

We know,

Mass= Area× density

$=(2r \pi \triangle r)(\frac{40}{1+r^2}})$

Total mass $M=\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i$

Therefore

$\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i=\int_0^5 \frac{80r\pi }{1+r^2}dr$

$=40\pi[ln(1+r^2)]_0^5$

$=40\pi [ln(1+5^2)-ln(1+0^2)]$

$=40\pi ln(26)$

= 409.59 kg (approx)

Therefore the mass of the of the oil is 409.59 kg.

3 0

2 years ago

I need to show my work, could anyone help? (need by tonight 3/10/20

marishachu [46]

Answer:

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Step-by-step explanation:

The car requires one gallon every 32 miles...

The car requires c gallons for 448 miles

c = 448 × 1 / 32

= 14 gallons..

One gallon = $3

Fourteen gallons = ??

14 × 3 / 1 = $42

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3 years ago

When a dice is rolled find the probability of getting a number less than or equal to 6

Dahasolnce [82]

Answer:

100% probability right?

Step-by-step explanation:

a dice only has 6 sides

7 0

2 years ago

PLEASE HELPPP PLS

Morgarella [4.7K]

Answer:

y + n³ = 6 - v²

hope this is the answer.

8 0

3 years ago

Read 2 more answers