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4 years ago

Plss help because idk understand plsssssss heeeeelllllllppppppp

Mathematics

1 answer:

Anika [276]4 years ago

5 0

Answer:

Only B

Step-by-step explanation:

As it says in the graph, the situation we're dealing with are hours to meters. So, A would not be the correct answer. B shows proper use of both hours and meters with the right values. C is incorrect because the answer is B.

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The initial value of a quantity Q (at year t = 0) is 112.8 and the quantity is decreasing by 23.4% per year. a) Write a formula

Svetach [21]

Answer:

a) $Q(t) = 112.8*(0.766)^{t}$

b) When t = 10, Q = 7.845.

Step-by-step explanation:

The value of a quantity after t years is given by the following formula:

$Q(t) = Q_{0}(1 + r)^{t}$

In which $Q_{0}$ is the initial quantity and r is the rate that it changes. If it increases, r is positive. If it decreases, r is negative.

a) Write a formula for Q as a function of t.

The initial value of a quantity Q (at year t = 0) is 112.8.

This means that $Q_{0} = 112.8$ .

The quantity is decreasing by 23.4% per year.

This means that $r = -0.234$

$Q(t) = 112.8*(1 - 0.234)^{t}$

$Q(t) = 112.8*(0.766)^{t}$

b) What is the value of Q when t = 10?

This is Q(10).

$Q(t) = 112.8*(0.766)^{t}$

$Q(t) = 112.8*(0.766)^{10} = 7.845$

When t = 10, Q = 7.845.

4 0

4 years ago

PLEASE HELP

SVEN [57.7K]

Answer:

Son's Age: 11

Mary's Age: 33

Step-by-step explanation:

Let set Mary and her son as variables,

M = Mary's age

S = Mary's son age

Breakdown:

"Mary is three times as old as her son"

M = 3S

"In 12 years, Mary's age will be one less than twice her son's age"

M + 12 = 2(S + 12) - 1

we add 12 to both sides as it will be in 12 years for both

We know that M = 3S, so we plug this in

3S + 12 = 2(S + 12) - 1

Now solve for S (son's age),

3S + 12 - 12 = 2(S + 12) - 1 - 12

3S = 2(S + 12) - 13

3S = 2S + 24 - 13

3S - 2S = 2S - 2S + 24 - 13

S = 24 - 13

S = 11

To find Mary age, plug in her son age ,

M = 3S

M = 3(11)

M = 33

Learn more about Substitution here: brainly.com/question/22340165

3 0

2 years ago

Use the interactive tool to create the three-dimensional

Sati [7]

The surface area of the three dimensional solid is 72 square centimeters and its three dimensional diagram is attached.

Step-by-step explanation:

The given is,

Detailed view or net diagram of the three dimensional diagram.

Step:1

Three dimensional diagram of the given net diagram is attached.

From the three dimensional diagram given net diagram is rectangular prism.

Step:2

From the three dimensional diagram

Formula for surface area of the rectangular prism,

$A = 2(wl + lh + hw)$ ..............................(1)

Where, w - Width

l - Length

h - Height

From the attachment,

l = 6 cm

w = 2 cm

h = 3 cm

Equation (1) becomes,

$A = 2((6)(2) + (6)(3) + (3)(2))$

= 2 ( 12 + 18 + 6 )

= 2 ( 36 )

A = 72 squared centimeters

( or )

From the net diagram,

Surface area, A = ((6×3)+(2×3)+(2×6)+(2×3)+(3×6)+(2×6))

= 18 + 6 + 12 + 6 + 18 + 12

= 72

Surface area, A = 72 squared centimeters

Result:

The surface area of the three dimensional solid is 72 square centimeters and its three dimensional diagram is attached.

4 0

3 years ago

Read 2 more answers

The four corners of a rectangle at the points (-3,-4), (5,-10), (-3,-10), and (5,-4) on a coordinate plane. How many square unit

Grace [21]

Check the picture below, you can pretty much count the units off the grid for the length and width.

recall area = length * width.

8 0

4 years ago

The equation of a line is given below.

navik [9.2K]

Answer:

convert into slope intercept form by using inverse operations.

8 0

3 years ago