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34kurt
3 years ago
14

2/9 of the students are in sixth-grade

Mathematics
2 answers:
elena-14-01-66 [18.8K]3 years ago
5 0

Answer:

a. 20

b. 60

Step-by-step explanation:

For this problem you could want to multiply 2/9 and 90, to get the first one, and the second one by doing 2/9 times 270, and since 270 is 3 times as much as 90, you could just multiply your first answer by 3.

hope this helps!

Lesechka [4]3 years ago
3 0

Answer:

19.8/90

59.4/270

Step-by-step explanation:

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PLZZZZZZZZZ HELP THANK YOUUUUUUUU !!!!!
photoshop1234 [79]

Answer:

<u><em>It has gone -160 miles.</em></u>

Step-by-step explanation:

To find the answer we will <em>multiply -40 by 4 hours</em>, and we get<em> -160 miles</em>.  Therefore, the car has <em>traveled -160 miles</em>.

7 0
2 years ago
A patio has an area of 1420 square feet. If the length is 45 1/2, what is the width​
Anni [7]

[ Answer ]

\boxed{Width \ = \ 31\frac{19}{91} \ Ft^{2}}

[ Explanation ]

Area = 1420

Width = 45\frac{1}{2}

Area For Rectangle: Length · Width

Use division to find width:

1420 ÷ 45\frac{1}{2}

Convert mixed numbers to fractions:

1420 = \frac{1420}{1}

45\frac{1}{2} = \frac{91}{2}

\frac{1420}{1} ÷ \frac{91}{2}

Use mixed multiplication:

\frac{1420*2}{1*91}

= \frac{2140}{91}

Simplify:

= 31\frac{19}{91}

\boxed{[ \ Eclipsed \ ]}

7 0
2 years ago
In a water treatment plant, water passes through a cone-shaped filter with a height of 4 m and a diameter of 9 m. The water flow
kicyunya [14]
B is the answer!!!!!!!!1

3 0
3 years ago
Find the measurements of ∠ and ∠.
kirza4 [7]

Answer:

<em>m∠ FAE = 20°, m∠ CAD = 60°</em>

Step-by-step explanation:

If you take a look at the picture below, this explanation proves that the measure of FAE ⇒ 20°, and m∠ CAD = 60°;

8 0
2 years ago
Calculate the amount of hcn that gives the lethal dose in a small laboratory room measuring 12.0 ft×15.0 ft×8.50ft.
Anarel [89]
Dimensions of the room in cm = 2.54 x 12 by 15 x 2.54 by 2.54 x 8.5 = 30.48 by 38.1 by 21.59

Volume of the room in cubic cm = 30.48 x 38.1 x 21.59 cubic cm = 25,072.21 cubic cm

Given that the density of air at room temperature is 0.00118g/cm^3, thus the mass of air in the room = 25,072.21 x 0.00118 = 29.59 g = 0.0296 kg

Given that the lethal dose of HCN is approximately 300 mg HCN per kilogram of air when inhaled, thus the <span>amount of HCN that gives the lethal dose in the small laboratory room is given by 300 x 0.0296 = 8.88 mg.</span>
7 0
3 years ago
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