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3 years ago

8

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. Last year there were 63 inches of s

now. How many standard deviations from the mean is that?

1 answer:

Basile [38]3 years ago

6 0

63 - 38
Just calculate the z-score: y = ---------------- = 25/10, or z = 2.5 (answer)
10

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The sum of two consecutive cube numbers is 341. Work out the two numbers. (2 marks)

Kobotan [32]

Answer:

63 and 53

Step-by-step explanation:

you could use trail and error. So:

13+23=9

33+43=91

63+73=559

53+63=341

3 0

3 years ago

A can of soda is 6 inches tall and has a diameter 3 inches how much soda does the can hold in terms of pi

Leno4ka [110]

Answer:

diameter / 2 = radius

3 / 2 = 1.5

radius x radius x height x pi = volume

1.5 x 1.5 x 6 = 13.5

We don't multiply by Pi because it is already included

Hope this helps

Step-by-step explanation:

6 0

3 years ago

e greater roadrunner bird can run 14 miles per hour. at’s 7 times faster than an ostrich can walk. How fast does an ostrich walk

ExtremeBDS [4]

14 / 7 = 2

An ostrich walks 2 miles an hour.

3 0

3 years ago

Brianna has x nickels and y pennies. She has no less than 20 coins worth no more

Bond [772]

Answer:

$y \ge 20 - x$

$y \le 80 -5x$

$(x,y) = (15,5)$

Step-by-step explanation:

Given

$Nickels = x$

$Pennies = y$

$Amount = \$0.80$ maximum

$Coins = 20$ minimum

Required

Solve graphically

First, we need to determine the inequalities of the system.

For number of coins, we have:

$x\ +\ y\ge 20$ because the number of coins is not less than 20

For the worth of coins, we have:

$0.05x\ +\ 0.01y\ \le0.80$ because the worth of coins is not more than 0.80

So, we have the following equations:

$x\ +\ y\ge 20$

$0.05x\ +\ 0.01y\ \le0.80$

Make y the subject in both cases:

$y \ge 20 - x$

$0.01y \le 0.80 - 0.05x$

Divide through by 0.01

$\frac{0.01y}{0.01} \le \frac{0.80}{0.01} -\frac{ 0.05x}{0.01}$

$y \le \frac{0.80}{0.01} -\frac{ 0.05x}{0.01}$

$y \le 80 -5x$

The resulting inequalities are:

$y \ge 20 - x$

$y \le 80 -5x$

The two inequalities are plotted on the graph as shown in the attachment.

$y \ge 20 - x$ --- Blue

$y \ge 80 -5x$ --- Green

Point A on the attachment are possible solutions

At A:

$(x,y) = (15,5)$

4 0

2 years ago

PLEASE HELP WILL MARK AND 5 STARS I BEG OF U

jek_recluse [69]

Answer:

X=120

X=54

Step-by-step explanation:

(this is for the top one and the one below the top one)

(I think they are right)

3 0

2 years ago

Read 2 more answers