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pochemuha
3 years ago
9

How do you work this out

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
6 0

Answer:

Below.

Step-by-step explanation:

To find the number of students in each grade you multiply the marks by the frequency density. The number of students is given by the area under the  rectangles.

So to find the number of students with grade U (< 160)  it is:

120 * 0.2 + 40*0.5

= 24 + 20

= 44.

The number for Grade E

= (200 - 160) * 0.5

= 40 * 0.5

= 20.

The others can be found in the same way.

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Sunflower produce approximately 50 seeds per flower. If one ounce of sunflower seeds contain an average of 72 seeds, how many fl
ra1l [238]

Given :

Sunflower produce approximately 50 seeds per flower.

If one ounce of sunflower seeds contain an average of 72 seeds.

To Find :

How many flowers are needed to produce 2 pounds of seeds.

Solution :

1 pound = 16 ounces .

So , 2 pound = 32 ounces .

Number of seeds in 2 pounds of seeds, n = 32×72 = 2304 .

Number of flowers are :

N=\dfrac{2304}{50}=46.08

So , approximate number of flower required are 46.

Hence, this is the required solution.

5 0
3 years ago
You are offered an item of $17.85 if the sellers states he normally sets the same item for $19.95 what percentage discount it he
nadezda [96]

Answer:

Discount percentage = 10.5% (Approx)

Therefore the discount is seller offering you is 10.5 % .

Step-by-step explanation:

Discount = Marked price - Selling price

As given

You are offered an item for $17.85. If the seller states he normally sells the same item for $19.95 .

Here

Marked price = $19.95

Selling price = $17.85

Discount = 19.95 - 17.85

           = $2.1

\frac{2.1 x 100}{19.95}

\frac{210}{19.95}

Discount percentage = 10.5% (Approx)

Therefore the discount is seller offering you is 10.5 % .

6 0
2 years ago
Bath and body works sells a scented candle that urns 1/8 of an inch in every 1/4 of an hour. How many inches would the candle bu
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Answer:

1/2 of an inch will be burned in 1 hour.

Step-by-step explanation:

5 0
2 years ago
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Eight friends are sharing 3 pizzas. The pizzas are the same size, and each person will eat the same amount. What fraction tells
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\frac{8}{3}
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Which of the following equations is used to calculate the probability of event A happening, given that event B has occurred?
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Answer:

B

Step-by-step explanation:

Not much to explain

6 0
3 years ago
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