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DedPeter [7]
3 years ago
5

HELP ME!!! Answer in Scientific Notation and explain and show work.

Mathematics
1 answer:
umka21 [38]3 years ago
7 0
Multiplying means you add the exponents and dividing means you subtract the exponents. Treat the decimals as you normally would.
(4.3 \times  {10}^{8} ) \times (2.0 \times  {10}^{6} )
4.3 \times 2.0 = 8.6
8 + 6 = 14
8.6 \times  {10}^{14}

(6 \times  {10}^{3} ) \times (1.5 \times  {10}^{ - 2} )
6 \times 1.5 = 9
3 +  - 2 = 1
9 \times  {10}^{1}


(1.5 \times  {10}^{ - 2} ) \times (8.0 \times  {10}^{ - 1} )
1.5 \times 8 = 12
- 2 +  - 1 =  - 3
12 \times  {10}^{ - 3}


\frac{(7.8 \times  {10}^{3}) }{(1.2 \times  {10}^{4}) }
\frac{7.8}{1.2}  = 6.5
3 - 4 =  - 1
6.5 \times  {10}^{ - 1}


\frac{(8.1 \times  {10}^{ - 2} )}{(9.0 \times  {10}^{2} )}
\frac{8.1}{9.0}  = 0.9
- 2 - 2 =  - 4
0.9 \times  {10}^{ - 4}


\frac{6.48 \times  {10}^{5} }{(2.4 \times  {10}^{4} )(1.8 \times  {10}^{ - 2}) }
2.4 \times 1.8 = 4.32
4 +  - 2 = 2
\frac{6.48 \times  {10}^{5} }{4.32 \times  {10}^{2} }
\frac{6.48}{4.32}  = 1.5
5 - 2 = 3
1.5 \times  {10}^{3}
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Need help asap pls :)
pogonyaev

Answer:

See explanation below.

Step-by-step explanation:

First I'm going to find angle 2. Angle two plus 55 is equal to 115. 180-115=65. 65-55=10 Angle 2 = 10

Next, we can find angle 3. 55+10=65. 180-65=115. Angle 3 = 115

Angle 2 is equal to angle 5, angle 3 is equal to angle 6, and angle 4 is equal to 55.

Angle 5 = 10

Angle 4 = 55

Angle 6 = 115

Now we can find angle 8. 180-115=65. Angle 8 = 65

Angle 11 = 65

Angle 12 = 115

10+115=125 Angle 10 = 125

180-125 = 55 Angle 9 = 55

Angle 14 = 55

Angle 13 = 125

7 0
2 years ago
Read 2 more answers
Find the x intercepts of the parabola with vertex (-1,-16) and y intercept (0,-15)
Arlecino [84]
<span> first, write the equation of the parabola in the required form: </span>
<span>(y - k) = a·(x - h)² </span>

<span>Here, (h, k) is given as (-1, -16). </span>
<span>So you have: </span>
<span>(y + 16) = a · (x + 1)² </span>

<span>Unfortunately, a is not given. However, you do know one additional point on the parabola: (0, -15): </span>

<span>-15 + 16 = a· (0 + 1)² </span>
<span>.·. a = 1 </span>

<span>.·. the equation of the parabola in vertex form is </span>
<span>y + 16 = (x + 1)² </span>

<span>The x-intercepts are the values of x that make y = 0. So, let y = 0: </span>

<span>0 + 16 = (x + 1)² </span>
<span>16 = (x + 1)² </span>

<span>We are trying to solve for x, so take the square root of both sides - but be CAREFUL! </span>

<span>± 4 = x + 1 ...... remember both the positive and negative roots of 16...... </span>

<span>Solving for x: </span>
<span>x = -1 + 4, x = -1 - 4 </span>
<span>x = 3, x = -5. </span>

<span>Or, if you prefer, (3, 0), (-5, 0). </span>
8 0
3 years ago
Jeff wants to buy tickets for a football game for his friends. The stadium is selling tickets for $7 each. The stadium requires
aniked [119]

Your answer is D){28, 42, 56, 70, 84}

To answer this question you just have to make sure the amount he pays is a multiple of 7.If you know you times table then this should be easy

Times table of 7:

7,14,21,28,35,42,49,55,63,70,77,84.

Now you just need to find an answer choice who has these numbers.Lets check it out!

A) 11 isn't a multiple of 7

B) 56 isn't a multiple of 7

C) None of these are multiples of 7 except 7 so this is also incorrect

D) This is correct because they are all multiples of 7

Hope this makes sense.

7 0
2 years ago
The half-life of caffeine in a healthy adult is 4.8 hours. Jeremiah drinks 18 ounces of caffeinated
statuscvo [17]

We want to see how long will take a healthy adult to reduce the caffeine in his body to a 60%. We will find that the answer is 3.55 hours.

We know that the half-life of caffeine is 4.8 hours, this means that for a given initial quantity of coffee A, after 4.8 hours that quantity reduces to A/2.

So we can define the proportion of coffee that Jeremiah has in his body as:

P(t) = 1*e^{k*t}

Such that:

P(4.8 h) = 0.5 = 1*e^{k*4.8}

Then, if we apply the natural logarithm we get:

Ln(0.5) = Ln(e^{k*4.8})

Ln(0.5) = k*4.8

Ln(0.5)/4.8 = k = -0.144

Then the equation is:

P(t) = 1*e^{-0.144*t}

Now we want to find the time such that the caffeine in his body is the 60% of what he drank that morning, then we must solve:

P(t) = 0.6 =  1*e^{-0.144*t}

Again, we use the natural logarithm:

Ln(0.6) = Ln(e^{-0.144*t})

Ln(0.6) = -0.144*t

Ln(0.6)/-0.144 = t = 3.55

So after 3.55 hours only the 60% of the coffee that he drank that morning will still be in his body.

If you want to learn more, you can read:

brainly.com/question/19599469

7 0
2 years ago
If 596 people voted in the election, how many were over 65 years old?
svlad2 [7]
596*25%=149
149 people over the age of 65 years old voted
3 0
3 years ago
Read 2 more answers
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