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3 years ago

4. What does a purchasing power calculator compare?

Mathematics

1 answer:

zmey [24]3 years ago

8 0

Answer: A

Step-by-step explanation: A power calculator helps show how much the currency has changed therefore showing the past amount to the present amount

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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

3 years ago

Please answer this correctly without making mistakes

Gekata [30.6K]

Answer:

Step-by-step explanation:

The distance is given by

d = sqrt( (x2-x1) ^2 + ( y2-y1) ^2)

Since the x values are the same

d = sqrt( ( y2-y1) ^2)

d = sqrt( (( -6 - 10)^2))

d = sqrt((-16) ^2)

d = 16

We can also just find the number of squares between the points since the x value is the same.

10 - -6

10+6

4 0

3 years ago

Read 2 more answers

If x is a positive integer then the solution set of 4x+2<14 is

taurus [48]

4x + 2 < 14
4x < 14 - 2
4x < 12
x < 12/4
x < 3 S = { x <3 }

3 0

3 years ago

There is an ample supply of identical blocks (as shown). Each block is constructed from four 1 × 1 × 1 unit-cubes glued whole-fa

mezya [45]

Answer:

Step-by-step explanation:

(6x8x7)/4 = 84

3 0

3 years ago

Read 2 more answers

What's the distance between the points (–9,2) and (–4,2)?

algol [13]

If you are asking for the slope it is a zero slope because...

2-2 equals 0 and you don't need to solve the bottom because the top is a zero

but a horizontal slope is when the zero is on the bottom.

btw- I guarantee I am right because i am a Indian. My wisdom comes from God. Jesus Christ!!!!:):):)

7 0

3 years ago