3 years ago

Find the area of a circle with radius, r = 7.49m. Give your answer rounded to 2 DP.

Mathematics

1 answer:

adell [148]3 years ago

7 0

Answer:

Area ≈ 176.24m²

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Ivan

Answer:

D. the incenter

Step-by-step explanation:

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3 years ago

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Element X decays radioactively with a half life of 6 minutes. If there are 790 grams of Element X, how long, to the nearest tent

frosja888 [35]

Answer:

It takes 27 minutes for the element to decay to 35 grams

Step-by-step explanation:

Given:

Initial amount = 790 grams

Final amount = 35 grams

Half life = 6 minutes

To find:

Time taken for the element to reduce into 35 grams = ?

Solutions

Time taken = $half life \times \frac{ log(\frac{ initial amount}{final amount})}{log(2)}$

On substituting the values given, Time taken

= $6 \times \frac{log(\frac{790}{35})}{log(2)}$

= $6 \times \frac{log(22.57)}{log(2)}$

= $6 \times 4.496$

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= 27 minutes

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3 years ago

Fill in the blanks with two rational numbers (other than 1 and −1).

MA_775_DIABLO [31]

Answer:

2 and 20

Step-by-step explanation:

First how can we get rid of the fraction?

We can multiply -1/2 by 2 to get -1

Next what number do we multiply to get from -1 to -20?

-1x = -20

divide both sides by -1

x = 20

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2 years ago

Y = -9x Proportional or Non Proportional

Burka [1]

Y=-9x is proportional

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3 years ago

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What is the degree of 7x + 1?

Amiraneli [1.4K]

Answer:

Step-by-step explanation:

degree 1

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3 years ago