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3 years ago

Subtract 3 hours, 50 minutes from 5 hours, 20 minutes.

Mathematics

1 answer:

Sati [7]3 years ago

7 0

1 hour 30 mins because you add up the minutes from both individually and then subtract.

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Write a division expression for the fraction, 9/13

Mama L [17]

Answer:

9 divided by 13

Step-by-step explanation:

im not sure if this is right.

7 0

3 years ago

The heights of young American women, in inches, are approximately Normally distributed with mean μ and standard deviation σ = 2.

Flauer [41]

Answer:

Step-by-step explanation:

The heights of young American women, in inches, are approximately Normally distributed with mean μ and standard deviation σ = 2.4. If I want to construct a 99% confidence interval with a margin of error of no more than ± 1 inch, what is the smallest sample I can select?

6 0

3 years ago

Determine whether quantities vary directly or inversely and find the constant of variation. 16 factory workers made 40 pieces in

Andrei [34K]

Answer:

Part A) $8\ workers$

Part B) $10\ workers$

Part C) $40\ workers$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

Let

x -----> the number of workers

y ----> the number of pieces made

In this problem

The relation between the variables x and y represent a direct variation (proportional variation)

For x=16, y=40

Find the value of the constant of proportionality k

$k=\frac{y}{x}$

substitute the values

$k=\frac{y}{x}$

$k=\frac{40}{16}\\k=2.5\ \frac{pieces}{worker}$

The linear equation is equal to

$y=2.5x$

Part A) How many workers are needed to make 20 pieces

For y=20 pieces

substitute in the linear equation

$20=2.5x$

$x=8\ workers$

Part B) How many workers are needed to make 25 pieces

For y=25 pieces

substitute in the linear equation

$25=2.5x$

$x=10\ workers$

Part C) How many workers are needed to make 100 pieces

For y=100 pieces

substitute in the linear equation

$100=2.5x$

$x=40\ workers$

3 0

3 years ago

0.00045−2.5⋅10 −5 = what is the answer i been up all day

Mama L [17]

If I’m getting this right the equation is: 0.00045 - 2.5 x 10 - 5? The dot in between 2.5 and 10 indicates a multiplication sign

So...

0.00045 - (2.5 x 10) - 5
0.00045 - 25 - 5
= -29.9999 -> -30

8 0

3 years ago

The ratio of cats to dogs in a park is 3 to 4

EleoNora [17]

Answer:

if there are 12 cats there are 16 dogs

Step-by-step explanation:

3:4

6:8

12:16

7 0

3 years ago

Read 2 more answers