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2 years ago

I need help with this please help me if you are a good person

Mathematics

1 answer:

LenaWriter [7]2 years ago

3 0

6)
91 is a composite number because it's divisible by 7 and 13

7)
477 is divisible by 3 and 9, since the sum of its digits (18) is divisible by 3 and 9 ( or the sum is a multiple of 3 and 9) .Not divisible by 6

8)
348:is divisible by 4 because the last 2 digits (48) are a multiple of 4
348:is NOT divisible by 5 because the last digit is neither 5 nor 0
348:is divisible by 6 because it's divisible by 2 and also by 3

9)
23624 is divisible by 8 because te last 3 digits (624) are divisible y 8
(624/8 =78)
None of the others are divisible by 8

10) A number is divisible by 6 IF IT'S DIVISIBLE BY 2 AND BY 3:
213 NO

468 is divisible by 2 since the last digit is divisible by 2. It's also divisible by
3 since the sum of its digits [18] is divisible by 3, hence 468 is divisible by 6

621 it's divisible by 3 but NOT by 2, then it's not divisible by 6

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2 years ago

The lenght of the square-shaped field edge is 240 meters. Calculatr the field area in hectares

Katena32 [7]

Answer:

5.76 hectares

Step-by-step explanation:

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I hope this helps you :)

6 0

3 years ago

WILL GIVE BRAINLIEST

Evgesh-ka [11]

All you have to do is plug in the given values into the given equation and evaluate.

The expression is,

$A(t) = l{e}^{rt}$
But we have to analyze the problem carefully. This is a natural phenomenon that can be modelled by a decay function. The reason is that, after every hour we expect the medicine in the blood to keep reducing.

Therefore we use the decay function rather. This is given by,

$A(t) = l{e}^{-rt}$

where,

$l = 100 \: milligrams$

$r = \frac{14}{100} = 0.14$

and

$t = 10 \: hours$

On substitution, we obtain;

$A(10) = 100 \times {e}^{ - 0.14 \times 10}$

$A(10) = 100 \times {e}^{ - 1.4}$

Now, we take our calculators and look for the constant
$e$

,then type e raised to exponent of -1.4. If you are using a scientific or programmable calculator you will find this constant as a secondary function. Remember it is the base of the Natural logarithm.

If everything goes well, you should obtain;

$A(10) = 100 \times 0.24659639$

This implies that,

$A(10) = 24.66$

Therefore after 10 hours 24.66 mg of the medicine will still remain in the system.

3 0

3 years ago

What does 3x/4 equal?

tester [92]

Answer:

$\frac{3x}{4}$

Step-by-step explanation:

<em>Nothing can be done with the equation because there is no quotient. </em>

If there was, would be able to solve for x.

6 0

3 years ago