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tatyana61 [14]
3 years ago
14

I don’t get scientific notation. can someone help me on this?

Mathematics
1 answer:
Radda [10]3 years ago
8 0
Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form. It may be referred to as scientific form or standard index form, or standard. Scientific notation is a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8.
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A item on sale costs 80% of the original price.if the original price was $15 what is the sale price?
Effectus [21]

Answer:

$3

Step-by-step explanation:

Original price - Discounted price

= $15 - ($15 × 80%)

= $15 - ($15 × 80/100)

= $15 - ($1200/100)

= $15 - $12

= <u>$</u><u>3</u>

So, the sale price is $3

<em>Hope it helps and is useful</em><em> </em><em>:</em><em>)</em>

8 0
3 years ago
Jina must choose a number between 55 and 101 that is a multiple of 3, 6, and 9. Write all the numbers that she could choose.
kupik [55]

Answer:

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Step-by-step explanation:

8 0
2 years ago
A gardener is planting two types of trees:
Bumek [7]

Answer:

Step-by-step explanation:

let y represent number of years...

9 ft tall = (12 * 9) = 108 inches

10 ft tall = (12 * 10) = 120 inches

Type A : 9 ft (or 108 inches) and grows 6 inches per year..

108 + 6y

Type B : 10 ft (or 120 inches) and grows 3 inches per yr

120 + 3y

how many years will it take them to be the same height...so when will they be equal....so set them equal and solve for y

108 + 6y = 120 + 3y

6y - 3y = 120 - 108

3y = 112

y = 112/3

y = 37 1/3 years....or 37 years and 4 months <====

check...

108 + 6(37 1/3) = 120 + 3(37 1/3)

108 + 6(112/3) = 120 + 3(112/3)

108 + 672/3 = 120 + 336/3

672/3 - 336/3 = 120 - 108

336/3 = 112

112 = 112 (correct)

3 0
3 years ago
Find the distance between (2,-4) and (5,-8)
Talja [164]

Using the distance formula:

Distance = √((x2-x1)^2 + (y2-y1)^2)

Distance = √((5-2)^2 + (-8 - -4)^2

Distance = √(3^2 + -4^2)

Distance = √(9 +16)

Distance = √25

Distance = 5

7 0
3 years ago
Mona wants to obtain a 94% confidence interval for the mean weight of turtles. She read in the Big Book of Turtles that the stan
mel-nik [20]

Answer:

87

Step-by-step explanation:

Population standard deviation = σ = 37 grams

Confidence interval = 94%

(1-α)×100% = 94

⇒α = 0.06

From table z table and interpolation

z = 1.881

L = Confidence interval length = 15

N = Number of samples

L=2z_{\alpha/2}\frac{\sigma}{\sqrt N}\\\Rightarrow \sqrt N=2z_{\alpha/2}\frac{\sigma}{L}\\\Rightarrow \sqrt N=2\times 1.881\frac{37}{15}\\\Rightarrow \sqrt N=9.2796\\\Rightarrow N=86.11097616\approx 87

∴ Number of turtles must she must weigh is 87

6 0
3 years ago
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