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cricket20 [7]
3 years ago
12

James is estimating the amount of paint he needs for the walls of his 3.4m by 2.6m bedroom. His bedroom is 2.7m high. One litre

of paint covers about 10m2. About how many paint does James need?

Mathematics
1 answer:
bixtya [17]3 years ago
8 0
James will need about 5.008 Liters of Paint.

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A) 7.7 ft<br> b) 13.4 ft<br> c) 10.3 ft<br> d) 12.3 ft
ELEN [110]

Answer:

D. 12.3 ft

Step-by-step explanation:

This problem requires the use of trigonometric ratios. This one specifically uses the cosine ratio as it provides the hypotenuse and is asking for the side that is adjacent to the angle.

cos(40°)=a/16

cos(40°)×16=a/16×16

cos(40°)×16=a

a=12.256 ft

The length of side a is D. 12.3 ft.

3 0
3 years ago
Solve for x:<br> (X+1)(x-3) = 0
Anton [14]

Answer:


Step-by-step explanation:

x= -1 or x=3

8 0
3 years ago
Subtract.<br><br> (x + 1) − (−2x − 5)
scZoUnD [109]
3x+6, you have to distribute the negative to get the parentheses away and simplify
5 0
3 years ago
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Pls helppppp 30 minutes left!! If correct I'll give brainliest to who answers correct first.
anygoal [31]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Marine biologists have been studying the effects of acidification of the oceans on weights of male baluga whales in the Arctic O
PSYCHO15rus [73]

Answer:

c. 61.25 kg

Step-by-step explanation:

The margin of error in estimating the true mean weight of male baluga whales in the Artic Ocean.

a. 15.31 kg

b. 51.40 kg

c. 61.25 kg

d. 80.49 kg

Margin of Error Formula= z × Standard deviation/√n

95% confidence interval = 1.96

Standard deviation = 125kg

n = 16 samples

Margin of error= 1.96 × 125/√16

= 1.96 × 125/4

= 245/4

= 61.25kg

The margin of error in estimating the true mean weight of male baluga whales in the Artic Ocean is 61.25kg

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