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Paha777 [63]
3 years ago
6

A manager at a factory finds that in a random sample of 200 clocks, 15 are defective. What percent of the clocks are defective?

Mathematics
1 answer:
bogdanovich [222]3 years ago
8 0

Answer:

Part A-7.5%

Part B-?

Part C-400 clocks

Step-by-step explanation:

part a-Write a sample ratio.-Divide the numerator by the denominator and multiply by 100.

part B-Use the sample ratio.-Multiply the sample ratio by the total number of clocks in the population.

Part C-Write a sample ratio.-Multiply the sample ratio by the total number of clocks in the population.

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Lisa's shop sells 5 quarts of ice cream each day. How much is this in pints?
Sergeeva-Olga [200]

Answer:

10

Step-by-step explanation:

We know there are 5 quarts.

There are 2 pints for each quart.

This can be though of as a ratio of:

2 : 1

There are 5 quarts, which is 5 times bigger than the ratio of 1.

So this means we need to mutliply both sides of the ratio by 5, to make the quarts equivelent to 5:

2*5 : 1*5

=

10 : 5

So for every 5 quarts there are 10 pints.

Hope this helps!

8 0
3 years ago
Laura brought a new set of headphones for $4.45 and a video game for 9.55. if she paid with a $20 bill, how much change did she
Aliun [14]

Answer:

first we should add both purchase price

$4.45 + $9.55 = $14

so that

$20 - $14

=$6

6 0
2 years ago
A right triangle has legs of 15 centimeters and 22 centimeters. What is the length of the hypotenuse to the nearest tenth of a c
Burka [1]
26.6 centimeters I am pretty sure
8 0
3 years ago
After transforming f(x) = 2x² +4x + 3 into vertex form, the vertex is easily identifiable. Which ordered pair is the vertex?
jolli1 [7]

The vertex is (-1,1)

Explanation:

The equation is f(x)=2x^{2} +4x+3

To find the vertex, we need the equation in the form of f(x)=a (x-h)^{2}+k

Dividing each term by 2 in the equation f(x)=2x^{2} +4x+3

f(x)=2(x^{2} +2x+\frac{3}{2} )

Now, completing the square by adding and subtracting 1, we get,

f(x)=2(x^{2} +2x+1-1+\frac{3}{2} )

The first three terms can be written as (x+1)^{2},

f(x)=2[(x+1)^{2}+\frac{1}{2}  ]

Multiplying 2 into the bracket, we get,

f(x)=2(x+1)^{2} +1

This equation is of the form f(x)=a (x-h)^{2}+k

Now, we shall find the vertex (h,k)

Thus, h=-1 and k=1

Thus, the vertex is (-1,1)

7 0
3 years ago
Please help me with this asap
zysi [14]

Answer:

Upper left is 9, upper right is 9, lower left is 21

Step-by-step explanation:

They tell us there are 9 birds that are yes fly and yes fish, so that’s the upper right.

They tell us there are 18 yes fish total. Subtract the 9 from the upper right, and that leaves 9 for the upper left.

They tell us there are 39 birds total.

39 - 18 (all fish eaters) - 4 (no fly, no fish) = 17 that can fly but don’t eat fish.

Make sense? lmk if you have questions

7 0
2 years ago
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