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Dominik [7]
3 years ago
10

I need these asap......

Mathematics
1 answer:
Illusion [34]3 years ago
8 0

Answer:

3. ( 1.5 × 10⁵ )

1.5 × (10×10×10×10×10)=100000

1.5 × 100000= 150000

2. ( 3 × 10⁴ ) ( 7.2 × 10²)

3× (10×10×10×10) × ( 7.2 × (10×10)

(3× 10000) (7.2 × 100)

3× 10000=30000 7.2 × 100= 720

30000×720= 21 600 000

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le Gianna just started a running plan where she runs 20 miles the first week and then increases the number of miles she runs by
yuradex [85]

Answer:

Gianna ran 40 miles over the course of 17 weeks.

Step-by-step explanation:

20 miles in the first week.

5% increase each week.

17 weeks.

  • 5% * 20 = 1

1 mile increase each week.

  • 17 * 1 = 17

17 mile increase over the course of 17 weeks.

  • 20 + 17 = 37

37 miles over the course of 17 weeks.

Round 37 to the nearest whole number.

  • 37 ^ 40

4 0
3 years ago
The weekly earnings of students in one age group are normally distributed with a standard deviation of 47 dollars. A researcher
ELEN [110]

Answer:

Option D) 340

Step-by-step explanation:

We are given the following in the question:

Alpha, α = 0.05

Population standard deviation, σ = $47

Margin of error = 5

95% Confidence Interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

\text{Margin of error} = z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

5 = 1.96(\dfrac{47}{\sqrt{n}} )\\\\\sqrt{n} = \dfrac{47\times 1.96}{5}\\\\n = 339.443776\\\Rightarrow n \approx 340

Thus, the correct answer is

Option D) 340

7 0
3 years ago
Elizabeth can jog 1 1/2 miles in 1/2 hour. How many miles can she jog in 1 hour
Nadya [2.5K]

Answer:

3 miles

Step-by-step explanation:

1/2 hour is 30 minutes so 1.5 x 2 is 3

5 0
3 years ago
Read 2 more answers
Uma loja de equipamentos eletrônicos anunciou um celular com duas opções de venda. Na primeira opção, o pagamento pode ser feito
Lena [83]

Responda:

Preço = $ 400

Explicação passo a passo:

Dado que:

Primeira opção :

Pagamento em 5 investimento igual

Segunda opçao :

Pagamento feito em 8 iguais. Investimento

O preço por parcela do primeiro investimento é 30 a mais do que cada um do segundo

Deixe o preço do telefone = p

Valor por prestação = x

Segunda parcela:

Preço = 8x

Primeiro :

Valor por parcela = x + 30

P = 5 (x + 30)

Preço = 5x + 150

Portanto, igualando as duas equações:

8x = 5x + 150

8x - 3x = 150

5x = 150

x = $ 50

Usando qualquer das equações de preço:

Preço = 8x

Preço = 8 * 50

Preço do telefone = $ 400

3 0
3 years ago
Which similarity statement is true for the triangles shown?<br><br> - ABC = DEF<br> - ABC = FED
kodGreya [7K]

Answer:

I’m pretty sure it’s Triangle ABC is congruent to Triangle DEF.

Step-by-step explanation:

If you rotate Triangle DEF to where the 90 degree angle is on the bottom right, you can the compare the two triangles. You can divide 300/25, 240/20, and 180/15. They all result in 12 meaning they are congruent and similar in that way. (I’m only 90% this is right btw)

3 0
3 years ago
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