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3 years ago

What is the sum of (1.3 × 10-7) and (-3.8 × 10-3)?

1 answer:

8 0

1.3 x 10⁻⁷ + -3.9 x 10⁻³

1.3 x 10⁻⁷ = 0.00000013
-3.9 x 10⁻³ = -0.0039

- 0.00390000
+ <u>0.00000013 </u>
- 0.00389987 ⇒ -3.8 x 10⁻³ CHOICE D.

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(ab² + 13b - 4a) + (3ab² + a +7b)

Natalija [7]

Answer:

4ab² + 20b - 3a

Step-by-step explanation:

This question most likely asks us to simplify the expression, as factoring is not possible...

(ab² + 13b - 4a) + (3ab² + a + 7b),

ab² + 13b - 4a + 3ab² + a + 7b,

ab² + 3ab² + 13b + 7b - 4a + a,

Solution : 4ab² + 20b - 3a

4 0

2 years ago

Billie Holiday sells children's clothing for Sara Vaughn's Toddler Shop. Baby blankets sell for $29.99 after a markup rate based

Mariulka [41]

Answer:

Cost: $14.349

Markup: $15.649

Step-by-step explanation:

1. Rewrite the percent as decimal. Divide it by 100, as following:

109/100=1.09

3. Now, knowing that Baby blankets sell for $29.99 after a markup rate based on cost of 109%, you can write the following expresion:

$x+1.09x=29.99$

Where x is the cost.

4. You must solve for x, then, you obtain:

$2.09x=29.99\\x=\frac{29.99}{2.09}\\x=14.349$

5. The markup is:

$M=29.99-14.349=15.649$

6 0

2 years ago

Read 2 more answers

Find the factors for each of the following 40, 21

Nadya [2.5K]

21:2,1,3

40:2,4,5,8,10,20

5 0

3 years ago

Pls help and don’t answer if you don’t know it! Thanks!

Citrus2011 [14]

Answer:

d) The stairs can be broken into 6 rectangle prisms. The dimensions of each solid figure are 0.576 m3.

e) 3.456 m3

Step-by-step explanation:

d) 1.2/3=0.4

1.8/3=0.6

0.4 x 0.6 x 2.4=0.576

e) 0.576 x 6= 3.456

6 0

2 years ago

PLSSS HELP A circle is cut from a square piece of cloth, as shown:

Pie

It would be 1,808.64 in2 because you find the area of the circle using a=πR²

3 0

1 year ago