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3 years ago

9

A crew of highway workers paved 2/15 miles in 20 minutes. If they work at the same rate, what portion of a mile will they pave i

n one hour?

1 answer:

Gennadij [26K]3 years ago

4 0

Since they completed 2/15 miles in 20 mins.

There are 60 mins in an hour so we can multiply they amount of work they did by 3 and that will equal .4

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12 picks in all . 1 out of 4 picks are orange . the rest are green . How many picks are orange ?

makvit [3.9K]

For every 4 picks there is 1 orange pick, so 12/4 should be fine

7 0

3 years ago

The admission prices for a small fair are $1.50 for children and $4.00 for adults. In one day there was $5050 collected. If we k

aliina [53]

Answer: 475 adults paid admission

Step-by-step explanation:

1.50c+4a=5050 (1.50 per child and 4 per adult)

1.50(2100)+4c=5050 (2100 children times 1.5 each)

3130+4a=5050

4a=1900

a=475

3 0

3 years ago

You have 9 medals.<br> You have 9 fewer than your friend. How<br> many medals does your friend have?

Ivan

Your friend has 18 medals.

7 0

2 years ago

What is the center of the data?

satela [25.4K]

Answer:

$Median = 13$

Step-by-step explanation:

Given

See attachment for dot plot

Required

The center of data

This implies that, we calculate the median

From the attached plot,

$n = 13$ --- number of observation

So, the median is:

$Median = \frac{n + 1}{2}$

$Median = \frac{13 + 1}{2}$

$Median = \frac{14}{2}$

$Median = 7th$

The median is at the 7th position

At the 7th position, is 13

Hence:

$Median = 13$

5 0

2 years ago

Read 2 more answers

Worldwide, the proportion of babies who are boys is about 0.51 . Let the random variable X represent the number of boys in five

solmaris [256]

Answer:

mean = 2.55

Standard deviation = 1.118

Step-by-step explanation:

Probability of babies who are boys

P = 0.51

Then we have q = 1-p

= 1-0.51

= 0.49

We have n = 5

We calculate the mean as:

np

= 0.51x5

= 2.55

Therefore mean = 2.55

The standard deviation

= √variance

= √npq

= √0.51x5x0.49

=√1.2495

= 1.118

6 0

2 years ago