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2 years ago

Calculate the surface area of the following objects.

Mathematics

1 answer:

34kurt2 years ago

7 0

Answer: 15150 $cm^{2}$

Step-by-step explanation:

2(83 × 45) + 2(30 × 45) + 2(30 × 83)

2(3735) + 2(1350) + 2(2490)

7470 + 2700 + 4980

= 15150

please give me a brainliest answer

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Question 2

irakobra [83]

Answer :

2 hours 36 minutes

Step-by-step explanation :

speed = distance / time

Distance = 150 km

time = 1 hour 30 minutes

= 1,5 hours

$speed = \frac{150 \: km}{1.5 \: hours}$

$speed = 100 \: km/hour$

<h3>Answer :</h3>

How long will it take the car to cover a distance of 260 km at the same average speed ?

Time = Distance/Speed

= 260 km / 100 km/hour

= 2,6 hours

____________________

to convert hours to hours and minutes we can multiply by 60.

2, 6 hours

2 hours and 0,6 hours

0,6 = 3/5

3/5 × 60

60 ÷ 5 × 3

36 minutes

2,6 hours = 2 hours 36 minutes

3 0

2 years ago

I need help to see if my answers are correct, thank you

Marta_Voda [28]

Answer:

what is the question so I can answer

3 0

2 years ago

What additional information is needed to prove that the triangles are congruent using the AAS congruence theorem? LO ≅ LM OA ≅ M

geniusboy [140]

Answer:

∠LOA≅∠LMA

Step-by-step explanation:

The first two options are incorrect because you need one more set of congruent ANGLES, not SIDES. The last option would prove congruency, but through ASA, not AAS. So it would be the third option.

7 0

2 years ago

Jimmy wants to buy 4 pounds of potatoes, but the supermarket only sells potatoes as kilograms. how many kilograms of potatoes sh

BARSIC [14]

It will have to be about 1.814 kilograms

4 0

3 years ago

A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtain

slega [8]

Answer: 8359

Step-by-step explanation:

The formula for sample size needed for interval estimate of population proportion :-

$n=p(1-p)(\frac{z_{\alpha/2}}{E})^2$

Given : The significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}}=z_{0.025}=\pm1.96$

Previous estimate of proportion : $p=0.32$

Margin of error : $E=0.01$

Now, the required sample size will be :-

$n=0.32(1-0.32)(\frac{1.96}{0.01})^2=8359.3216\approx8359$

Hence, the required sample size = 8359

5 0

3 years ago

Calculate the surface area of the following objects.​

Calculate the surface area of the following objects.