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2 years ago

Which of the following represents a function?

Mathematics

2 answers:

Svetlanka [38]2 years ago

7 0

Is there a none option? if not then it has to be B.

wariber [46]2 years ago

3 0

The second one because it pass the vertical line test

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2. Who do you called the number in the expression 2x + 70 A variable B consioni C.bose D exponent

Komok [63]

Answer:

The answer to this question would be constant

Step-by-step explanation:

4 0

2 years ago

Element X is a radioactive isotope such that its mass decreases by 26% every day. If an experiment starts out with 810 grams of

ioda

Answer:

The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

The function to represent the mass of the sample after t days is $A(t) = 810(0.74)^t$

Step-by-step explanation:

Exponential equation of decay:

The exponential equation for the amount of a substance is given by:

$A(t) = A(0)(1-r)^t$

In which A(0) is the initial amount and r is the decay rate, as a decimal.

Hourly rate of change:

Decreases 26% by day. A day has 24 hours. This means that $A(24) = (1-0.26)A(0) = 0.74A(0)$ ; We use this to find r.

$A(t) = A(0)(1-r)^t$

$0.74A(0) = A(0)(1-r)^{24}$

$(1-r)^{24} = 0.74$

$\sqrt[24]{(1-r)^{24}} = \sqrt[24]{0.74}$

$1 - r = (0.74)^{\frac{1}{24}}$

$1 - r = 0.9875$

$r = 1 - 0.9875 = 0.0125$

The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

Starts out with 810 grams of Element X

This means that $A(0) = 810$

Element X is a radioactive isotope such that its mass decreases by 26% every day.

This means that we use, for this equation, r = 0.26.

The equation is:

$A(t) = A(0)(1-r)^t$

$A(t) = 810(1 - 0.26)^t$

$A(t) = 810(0.74)^t$

The function to represent the mass of the sample after t days is $A(t) = 810(0.74)^t$

5 0

2 years ago

The sum of 3 interior angles of a quadrilateral is 262°. Find the measure of the fourth interior angle.

Vilka [71]

The four interior angles of a quadrilateral always add to 360<span>°, so the answer is 98</span>

8 0

2 years ago

Read 2 more answers

How can I solve this?

kotegsom [21]

I completely forgot how to do this but maybe multiply the angles I’m so sorry

4 0

2 years ago

Can i get help on 18 & 22 please

Pavlova-9 [17]

18) 36.36 rounded it is 36.4

22)53.71 rounded it it’s just 53.7

5 0

2 years ago