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3 years ago

15

The solid below is made from 1 yard cubes. Find its surface area.

1 answer:

xxMikexx [17]3 years ago

7 0

Answer:

Surface area = 80yd

Step-by-step explanation:

4x3 + 4x4 + 4x3 + 4x4 + 4x3 + 4x3 = 80

hope this helped :D

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The amount of medicine in a patient's bloodstream is shown by the function A(h)=600(0.75)^h, where h is the number of hours that

scoundrel [369]

The amount of medicine in the bloodstream decreases by 25% each hour.

<h3>Exponential equation</h3>

The standard exponential equation is expressed as:

y = ab^x

a is the initial amount

b is the rate

If b < 1, hence there is a declince

Given the expoenentia equation A(h)=600(0.75)^h,

b = 1 - r = 0.75

r = 1 - 0.75

r = 0.25

This shows that the amount of medicine in the bloodstream decreases by 25% each hour.

Learn more on exponential equation here: brainly.com/question/12940982

5 0

2 years ago

Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth 5y^2-8y=2

solmaris [256]

Answer:

Step-by-step explanation:

First, rewrite the equation (all terms should be in the left side):

$5y^2-8y-2=0.$

In this equation,

$a=5;$
$b=-8;$
$c=-2.$

Then the discriminant

$D=b^2 -4ac=(-8)^2-4\cdot 5\cdot (-2)=64+40=104.$

Then

$y_1=\dfrac{-b+\sqrt{D}}{2a}=\dfrac{-(-8)+\sqrt{104}}{2\cdot 5}=\dfrac{8+2\sqrt{26}}{10}=\dfrac{4+\sqrt{26}}{5},\\ \\y_2=\dfrac{-b-\sqrt{D}}{2a}=\dfrac{-(-8)-\sqrt{104}}{2\cdot 5}=\dfrac{8-2\sqrt{26}}{10}=\dfrac{4-\sqrt{26}}{5}.$

6 0

3 years ago

The resultant vector from the cross product of two vectors is _____________ a) perpendicular to any one of the two vectors invol

prohojiy [21]

Answer:

b) perpendicular to the plane containing both vectors

Step-by-step explanation:

The cross product is perpendicular to both contributing vectors. Consequently, it is perpendicular to the plane containing them.

5 0

3 years ago

A bank teller provides the balance of Halle’s account before and after she withdraws some money. Before: $500 After: $327

vredina [299]

That means she withdrew 173 dollars

3 0

3 years ago

Water boils at different temperatures at different elevations. The boiling temperature of water is 212 degrees * F sea level (0

Nikolay [14]

Answer:

The elevation when the boiling point of water is $190$ ° $F$ is 12790.70 feet

Step-by-step explanation:

Let every 1,000 feet of elevation be $x$ . Hence, we can write

$T = 212$ $- 1.72x$

Where $T$ is the boiling temperature of water at different elevations

Now, to the determine the elevation when the boiling point of water is $190$ ° $F$ .

We will determine $x$ by putting $T = 190$ ° $F$ .

Hence,

$T = 212$ $- 1.72x$

$190$ $= 212$ $- 1.72x$

$190 - 212$ $= - 1.72x$

$- 22$ $= - 1.72x$

$22 = 1.72x\\x = \frac{22}{1.72} \\x = 12.79070$

Since $x$ represents every 1,000 feet of elevation, then the elevation when the boiling point of water is $190$ ° $F$

$12.79070$ × $1000\\$ $= 12790.70$ feet

Hence, the elevation when the boiling point of water is $190$ ° $F$ is 12790.70 feet

8 0

4 years ago