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goldenfox [79]
3 years ago
13

Convert 0.0045 from standard form to scientific notation.

Mathematics
2 answers:
V125BC [204]3 years ago
8 0
Correct answer is A.

0.0045= \frac{45}{10,000}= \frac{4.5}{1,000}= \frac{4.5}{10^3}=4.5 \times 10^{-3}
djyliett [7]3 years ago
3 0
I did not catch well, but i think you already got your answers. Let me explain. For the first part you got your notation right: for 0.0045 the correct scientific notation is 4.5 x 10^-3. Now the second part, the answer would be the first one, the notation that you are giving is the one who corresponds to <span>4.5 x 10^-2, the first option you have. Hope it helps</span>
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What equation does the model represent
Olin [163]
5/6 im guessing ? Im pretty sure its 5:6
7 0
3 years ago
Jules has 1200 and is spending 40 per week. kelsey has 400 and is saving 50 a week. in how many weeks, will jules and kelsey hav
expeople1 [14]
After x weeks:
Jules will have: 1,200 + 40 x.
Kelsey will have: 400 + 50 x.
If we want to know in how many weeks will they have the same amount of money, we will make an equation:
400 + 50 x = 1,200 + 40 x
50 x - 40 x = 1,200 - 400
10 x = 800
x = 800 : 10
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Answer: In 80 weeks they will have the same amount of money.
4 0
3 years ago
Hi I have my answer in I’m just confused and think it’s gonna be wrong so could u guys help me
Masteriza [31]

Answer:

I believe the first one is rotation And the second is ABC= DEF.

Step-by-step explanation:

My geometry is really rusty so I apologize if they’re wrong

8 0
3 years ago
An oval track is made by erecting semicircles on each end of a 60m by 120m rectangle. Find the length of the track and the area
vodomira [7]
Refer to the figure shown below.

Because the question states that the semi circles are at the ends of the rectangle, each semicircle has a radius of 30 m.

The circumference of the oval is
2π(30) + 2*120 = 60π + 240 m = 428.5 m

The area of the oval is 
π(30²) + 60*120 = 900π + 7200 m² = 1.0027 x 10⁴ m²

Note:
If the semi circles are placed on the 120-m sides of the rectangle, then similar calculations yield:
Circumference = 120π + 120 m = 497 m
Area = 3600π + 7200 m² = 1.851 x 10⁴ m²

Answer:
If the semi circles are placed on the 60-m sides of the rectangle, then
Circumference = 60π + 240 m, or 428.5 m
Area = 900π + 7200 m², or 1.0027 x 10⁴ m²

if the semi circles are placed on the 120-m sides of the rectangle, then
Circumference = 120π + 120 m, or 497 m
Area = 3600π + 7500 m², or 1.851 x 10⁴ m²


3 0
3 years ago
Anyone know answer for number 4? My brain just isn’t working today hahaa
Dima020 [189]

Answer:

y=-6/5x + 1

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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