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2 years ago

Unit test Evaluate the following expression. Sum 2+1x2 ng de racting

Mathematics

1 answer:

DIA [1.3K]2 years ago

3 0

Answer:

2+7∛³≡34543.8947924

Step-by-step explanation:

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Four classmates collect data by conducting a poll. They ask students chosen at random how many books they read over the summer.

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Answer:

Maybe D

Step-by-step explanation:

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2 years ago

What is the determinant of this matrix:

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Answer:

-56

Step-by-step explanation:

Formula to get determinant is::

$\left[\begin{array}{ccc}a&b\\c&d\end{array}\right] = ad-bc$

0(0)-8(7)

0 - 56

-56

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1 year ago

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A customer deposits $500 in an account that pays 4% annual interest. What is the balance after 3 years if the interest is compou

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Answer:

Option D

Step-by-step explanation:

The compounded interes formula states that:

V(t) = P (1 + r/n)^ (nt)

t = years since initial deposit = 3

n = number of times compounded per year 1

r = annual interest rate (as a decimal) = 4% / 100 = 0.04

P = initial (principal) investment = $500

Then V(t) = $500 ( 1 + 0.04/1)^3 = 562,43

So the correct answer is option D.

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3 years ago

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A hockey team's morning workout schedule consists of 15 minutes of warm-ups, 30 minutes of weight training, and 20 minutes of ae

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Hello! The ratio would be 15 minutes warm ups: 65 minutes total workout.

To simplify this: 3:13 ratio. (Divided 15 by 5 and 65 by 5)

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2 years ago

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What is the surface area of this triangular prism rounded to the nearest tenth? A) 48.6km2 B) 63.4 km2 C) 72.6 km2 D) 84.4 km2

Mekhanik [1.2K]

Correct option B) $63.4km^2$ .

<u>Step-by-step explanation:</u>

We have the following figure attached as shown below.

Now, this triangular prism have 2 similar right angled surfaces and 3 rectangular surfaces , Let's calculate area for all of them:

2 similar right angled surfaces

We know that area of triangle = $\frac{1}{2} b(h)$

⇒ $area = \frac{1}{2} b(h)$

⇒ $area = \frac{1}{2} (3.6)(7.7)$

⇒ $area = 13.86km^{2}$

But there 2 such surfaces so , $area = 2(13.86) = 27.72km^2$

3 rectangular surfaces

Area of rectangle = $length(breadth)$

⇒ $area_1 = 3.6(1.8)$

⇒ $area_1 = 6.48km^2$

⇒ $area_2= 7.7(1.8)$

⇒ $area_2 = 13.86km^2$

⇒ $area_3 = 8.5(1.8)$

⇒ $area_2 = 15.3km^2$

Total area = $6.48 + 13.86 + 15.3 = 35.64km^2$

Adding area of 2 similar right angled surfaces & 3 rectangular surfaces:

$Area = 27.72+35.64 = 63.36km^2$ = $63.4km^2$

Correct option B) $63.4km^2$ .

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2 years ago

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