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pochemuha
4 years ago
9

How do you work this out

Mathematics
1 answer:
oksian1 [2.3K]4 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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You put $400 in a savings account. The account earns 10% simple interest per year.
gtnhenbr [62]

Answer:

1,760

Step-by-step explanation:

400+10%= 440

440×4=1760

8 0
3 years ago
A factory makes 450 pies every day.
Gemiola [76]
Step by step:

Each day it takes a sample of 15 pies - on Monday he needed 4:

4/15 = x/450 (450 being the total for each day)

4 x 450 = 1800
1800 divided by 15 = 120

120 is the amount of pies that were made on Monday


Hope this helps
Leave a like and brainliest!!
8 0
3 years ago
A truck traveled 205 miles in 3/12 hours. The distance is the product of the rate and the time. To the nearest tenth, what is th
Rufina [12.5K]

Distance = rate*time, or

distance = (average speed)* time, so

average speed = distance/ time.

average speed = 205 mi / (3/12) h = 205 mi/ (1/4)h = 205*4 mi/h=

= 820 mi/h

It is looks to high for speed of the truck,

probably time should be 3.12 h,

then

average speed = 205 mi / (3.12) h ≈ 65.71 mi/h.

That looks close to real life.



8 0
3 years ago
Give me a strategy of 5 / 162
DENIUS [597]
(Decimal: 0.030864)......
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4 years ago
For each store, what is the ratio of the number of cans to the price.
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