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mixer [17]
3 years ago
14

Which operation should you perform first in the expression 15 + 7 × (5 − 3) × 42 ÷ 6?

Mathematics
2 answers:
Marina CMI [18]3 years ago
7 0
(5-3)


I Hope I Helped! :D
xenn [34]3 years ago
3 0
To know which operation you would perform first, you need to use the order of operations. To help you remember this order, you may have heard of the acronym PEMDAS, or the phrase "Please Excuse M<span>y </span>Dear Aunt S<span>ally."

The letters (or first letters of each word) stand for the order you have to do your operations to get the right answer:
1) P - Parenthesis
Simplify what is inside the parenthesis first

2) E - Exponents
Simplify your exponents (roots and powers)

3) M - Multiplication, D - Division
Multiply or divide from left to right

4) A - Addition, S - Subtraction
Add or subtract from left to right

Using your order of operations, you can see that you should do what is inside the parenthesis first, making subtraction of </span><span>5 − 3 your first operation.
</span>
------

Answer: Subtraction (5-3)
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Find the volume of the solid formed by rotating the region bounded by the given curves about the indicated axis. Y = 1x, y = 1,
Goryan [66]

The disk method will only involve a single integral. I've attached a sketch of the bounded region (in red) and one such disk made by revolving it around the y-axis.

Such a disk has radius x = 1/y and height/thickness ∆y, so that the volume of one such disk is

π (radius) (height) = π (1/y)² ∆y = π/y² ∆y

and the volume of a stack of n such disks is

\displaystyle V_n = \sum_{i=1}^n \pi {y_i}^2 \Delta y

where y_i is a point sampled from the interval [1, 5].

As we refine the solid by adding increasingly more, increasingly thinner disks, so that ∆y converges to 0, the sum converges to a definite integral that gives the exact volume V,

\displaystyle V = \lim_{n\to\infty} V_n = \int_1^5 \frac{\pi}{y^2} \, dy

V = -\dfrac\pi y\bigg|_{y=1}^{y=5} = \boxed{\dfrac{4\pi}5}

8 0
2 years ago
HELPELEPLEPELP this needed to be done last week LSMOAJOMOSN
denpristay [2]

Answer:

1/1

Step-by-step explanation:

try that if that doesnt work try 1 the question was confusing im sorry if its wrong...

3 0
3 years ago
i have to find the perimeter of a rectangle. one side is 7/10 (fraction) and the other side is 2 1/4 (mixed number). What is the
allochka39001 [22]
Answer is this, Attached with a photo

5 0
3 years ago
Read 2 more answers
Suppose we are interested in bidding on a piece of land and we know one other bidder is interested. The seller announced that th
ira [324]

a. Suppose you bid $11,500. What is the probability that your bid will be accepted?

b. Suppose you bid $13,500. What is the probability that your bid will be accepted?

Answer:

a. 0.392

b. 0.784

Step-by-step explanation:

Given

a = 9,500 , b = 14,600

The probability density function is given by 1 divided by the interval between a and b.

f(x) = 1/(b - a)

f(x) = 1/(14,600 - 9,500)

f(x) = 1/5100

f(x) = 0.000196

a. Suppose you bid $11,500. What is the probability that your bid will be accepted?

This is given by the integration of f(x) over the interval in the probability

I.e.

P(x < 11,500) = Integral of 0.000196dx, where upper bound = 11,500 and lower bound = 9,500

Integrating 0.000196dx gives

0.000196x introducing the upper and lower bound.

We get

0.000196(11,500 - 9,500)

= 0.392

b. Suppose you bid $13,500. What is the probability that your bid will be accepted?

This is given by the integration of f(x) over the interval in the probability

I.e.

P(x < 13,500) = Integral of 0.000196dx, where upper bound = 13,500 and lower bound = 9,500

Integrating 0.000196dx gives

0.000196x introducing the upper and lower bound.

We get

0.000196(13,500 - 9,500)

= 0.784

8 0
3 years ago
The population of a city is 270​,000 and is increasing at a rate of 2.25​% each year. Approximately when will the population rea
maks197457 [2]

The population will reach 540 000 in 30.8 yr.

The formula for population growth is

<em>P</em>_<em>t</em> = <em>P</em>_0 × e^(<em>rt</em>)

540 000 = 270 000 × e^(0.0225t)

e^(0.0225t) = 2

0.0225t = ln2

t = (ln2)/0.0225 = 30.8



8 0
3 years ago
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