All categories

3 years ago

HELP 25 POINTS +BRAINIEST The weight of a substance measures 3 × 10^-3. grams. Express this weight in standard notation.

Mathematics

2 answers:

Sholpan [36]3 years ago

5 0

Answer:

Scientific notation is a way of writing very large and very small numbers.

A number in scientific notation has the form

, where

is a number between 1 and 10, and

is a positive or negative integer.

To convert to scientific notation, you move the decimal point until the new form is a number between 1 and 10 (

) and then record the exponent (

) as the number of places the decimal point was moved.

If you move the decimal to the right, the exponent is negative.

Express

0.000 000 03 g

in scientific notation.

Step 1. Move the decimal place to the right to create a new number between 1 and 10.

This gives

Step 2. Count the number of times you moved the decimal.

You moved the decimal 8 places to the right.

That means the exponent

-8

Step 3. Write the number in scientific notation.

0.000 000 03 g

-8

Step-by-step explanation:

Dmitriy789 [7]3 years ago

4 0

Answer:

37 grams

Step-by-step explanation:

3x10=30-3=37

You might be interested in

PLS HELP ILL MARK AS BRAINLESS

Advocard [28]

Answer: Area is 2250 and the peremiter is 210

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

I have this problem in Algebra that I cannot figure out :(

elena-14-01-66 [18.8K]

The answer is -4

Solution:

f(x) = 3x - 7
g(x) = 2x^2 - 3x + 1

(fog)(0)

= f(2(0)^2 - 3(0) + 1)
= f(2x^2 - 3x + 1)
= f(1)

= 3x - 7
= 3(1) - 7
= -4

8 0

3 years ago

What is 12 5/12 - 1 7/12?

pav-90 [236]

I just did it in my calculator and got 10.8333333333

PLEASE RATE THIS QUESTION!

6 0

3 years ago

Alvin is 7 years older than Elga. The sum of their ages is 97. What is Elga's age?

LenaWriter [7]

Elga's age = x

Alvin's age = x + 7

x + x + 7 = 97.

Simplify the left side of the equation

2x + 7 = 97.

Subtract 7 from each side

2x = 90.

Divide each side by 2

x = 45

Since x is equal to Elga's age, Elga is 45 years old

4 0

3 years ago

I need to work out x

frutty [35]

Answer:

9,765 cm

Step-by-step explanation:

We'll solve out the measurements for triangle ABC then it will be easy to figure out x

For triangle ABC, we have

Angle B = 90 degrees.

Angle A (CAB) = 38 degrees (the angle CAD is 19 and is said to be half of CAB, since the line AD is a bisector).

Angle C = 180 - 90 - 38 = 52 degrees.

To find the measurement of the BC line, which we label a, we know that

$\frac{a}{sin(A)} = \frac{c}{sin(c)}$

So, we can isolate the a to get:

$a = \frac{c * sin(A)}{sin(c)} = \frac{25 * sin(38)}{sin(52)} = 19.53$

Now we know the segment BC is 19.53 cm.

And we know that segments CD and DB are equal, since AD is a bisector, cutting the CAB angle in half.

So, CD is half of BC.... so 19.53 / 2 = 9.765 cm

7 0

3 years ago