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Papessa [141]
3 years ago
10

The mass of a small virus is 10^-20 kg. The mass of an average human cell is 10^-12 kg. Which of the two has lesser mass? how ma

ny less is it?
Mathematics
2 answers:
fredd [130]3 years ago
5 0

For this case we have:

10 ^ {- 20}, we must run the decimal point 20 spaces to the left.

0.00000000000000000010 \ kg

10 ^ {- 12}, we must run the decimal point 12 spaces to the left.

0.000000000010 \ kg

Thus, it is observed that the mass of a small virus is smaller!

We subtract and obtain:

10 ^ {-11}

ANswer:

The mass of a small virus is less!

Bess [88]3 years ago
5 0

Answer: -10kg

Step-by-step explanation:

10-20 =-10

10-22 =-12

-10 is lesser

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Question:

A solar lease customer built up an excess of 6,500 kilowatts hour (kwh) during the summer using his solar panels. when he turned his electric heat on, the excess be used up at 50 kilowatts hours per day .

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Answer:

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Step-by-step explanation:

Given

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Rate = 50kwh/day

Solving (a): E in terms of d

The Excess left (E) in d days is calculated using:

E = Excess - Rate * days

The expression uses minus because there's a reduction in the excess kwh on a daily basis.

Substitute values for Excess, Rate and days

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Solving (b); The value of E when d = 30.

Substitute 30 for d in E = 6500 - 50d

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E = 6500 - 1500

E = 5000

<em>Hence, there are 5000kwh left after 30 days</em>

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