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3 years ago

Which choice correctly expresses the number below in scientific notation 0.0000431

1 answer:

5 0

Scientific notation is form $a * 10^{x}$ , where 1 ≤ a < 10. So, you have to write like this:
$0.0000431 = 0.000431 * 0.1 = ... = 4.31 * 0.00001 = 4.31 * 10^{-5}$
since $0.00001 = 10^{-5}$
So, the answer is $4.31 * 10^{-5}$

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3 years ago

For the line represented by y = 5 x − 7, the slope is ________ and the

Dmitry_Shevchenko [17]

Answer:

For the line represented by y = 5 x − 7, the slope is 5 and the

y-intercept is -7.

Step-by-step explanation:

The equation is in <em>Slope-intercept form</em>.

$y=mx+b$

The letter 'm' represents the slope.

The letter 'b' represents the y-intercept.

In the equation $y=5x-7$ :

5 is the slope because it replaces 'm' in the equation. The 'm' is the slope.
-7 is the y-intercept because it replaces 'b' in equation. The 'b' represents the y-intercept.

<em>Brainilest Appreciated. </em>

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3 years ago

one days discharge at its mouth, 3 trillion gallons, could supply all of country A’s household for 5 months. how much water an a

serious [3.7K]

let's use engineering notation for the sake of brevity.

1 trillion is 1,000,000,000,000, or just 1E12, twelve zeros.

1 million is then 1E6, six zeros.

we know the discharge for one day is 3E12 gallons, and that'd do just fine for country A for 5 months. How many gallons in 1 month only?

$\bf \begin{array}{ccll} gallons&months\\ \cline{1-2} 3E12&5\\ x&1 \end{array}\implies \cfrac{3E12}{x}=\cfrac{5}{1}\implies 3E12=5x \\\\\\ \cfrac{3E12}{5}=x\implies 6E11=x\implies 600000000000=x$

if there are 200million inhabitants in A, namely 200E6 or 2E8 inhabitants, how many gallons per inhabitant from all those 6E11 gallons?

$\bf \begin{array}{ccll} gallons&households\\ \cline{1-2} 6E11&2E8\\ x&1 \end{array}\implies \cfrac{6E11}{x}=\cfrac{2E8}{1}\implies 6E11=2E8x \\\\\\ \cfrac{6E11}{2E8}=x\implies \cfrac{600000000000}{200000000}=x\implies 3000=x$

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4 years ago

A car traveling 35mph accelerates to a speed of 45mph in 75hr. What is the acceleration?

EastWind [94]

Answer:

3,375 mph is the anwser I'm 95% surw

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3 years ago

-3 + 1.5 = 7.5 What is t?

cestrela7 [59]

Answer: -.6

Step-by-step explanation: Isolate t

In order to keep the equation equal, what is done to one side must be done to the other

1. You would subtract 1.5 from each side so you end up -3t = 5

2. Divide -3 from both sides, you are left with t = -.6 which is your answer

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3 years ago