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3 years ago

Express 0.00078456 in scientific notation

Mathematics

2 answers:

kakasveta [241]3 years ago

8 0

Your answer would be:
7.8456 x 10 to the power of -4

Annette [7]3 years ago

5 0

7.8456 x 10^(-4)

this means you move the decimal place to the left 4 places to get the actual value

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For what value of x does g(x) =0 ?

Katena32 [7]

Answer:

x=6

Step-by-step explanation:

3 0

3 years ago

Sheldon harvests the strawberries and tomatoes in his garden. He picks 1 2/5 kg less strawberries in the morning than in the aft

Natalija [7]

Let

x ----> kilograms of strawberries that Sheldon picks in the morning

y ---> kilograms of strawberries that Sheldon picks in the afternoon

we have that

x=y-1 2/5

x=2 1/4 kg

substitute

2 1/4=y-1 2/5

Convert mixed numbers to an improper fraction

1 2/5=1+2/5=7/5

2 1/4=2+1/4=9/4

substitute

9/4=y-7/5

y=(9/4)+(7/5)

y=(45+28)/20

y=73/20 kg

Adds kilograms in the morning and afternoon

x+y=(9/4)+73/20)

x+y=(45/20)+(73/20)

x+y=118/20 kg

Convert to mixed number

118/20=100/20+18/20=5+18/20=5+9/10=5 9/10 kg

therefore

<h2>The answer is 5 9/10 kg</h2>

3 0

1 year ago

A certain aquarium holds 20 gallos of water . how many quarts of water does the aquarium hold

TEA [102]

There are 4 quarts in a gallon, so multiply 20 x 4 to get 80.

The aquarium can hold 80 quarts.

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7 0

3 years ago

Line segments JK and JL in the xy-coordinate plane both have a common endpoint J(-4,11) and midpoints at M, (2, 16) and M2 (-3,5

ohaa [14]

Answer:

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Step-by-step explanation:

We use the formula for the distance between two arbitrary points $(x_1,y_1)$ and $(x_2,y_2)$ in the xy-coordinate plane, that is:

$d=\sqrt{(x_1-x_2)^2 + (y_1-y_2)^2}$

So, replacing the points $M=(2,16)$ and $M_2=(-3,5)$ , we obtain:

$d=\sqrt{(2-(-3))^2 + (16-5)^2}\\d=\sqrt{(2+3)^2 + (16-5)^2}\\d=\sqrt{5^2 + 11^2}\\d=\sqrt{146 }=12.083045... \simeq 12.1$

that is the answer.

note: observe that we only use the coordinates between the two midpoints and not the point J.

5 0

3 years ago

PLEASE HELP!!!!! A satellite telescope has a parabolic dish. Satellite signals are collected at the focal point (focus) of the

-BARSIC- [3]

The dish illustrates operations on a parabola.

The depth of the parabolish dish is 160 feet.

The bowl is said to be a parabola.

So, we have:

$\mathbf{(x -h)^2 = 4p(y - k)}$

Where:

$\mathbf{Focus: p = 40}$

$\mathbf{Vertex:(h,k) = (0,0)}$

From the question, the diameter is 160 feet.

So, the radius (r) is:

$\mathbf{r = \frac{160}{2} = 80}$

So, the coordinate of the depth of the parabola would be:

$\mathbf{(x,y) = (60 + 100,y)}$

$\mathbf{(x,y) = (160,y)}$

Substitute these values in $\mathbf{(x -h)^2 = 4p(y - k)}$

So, we have:

$\mathbf{(160 - 0)^2 = 4 \times 40 \times (y -0)}$

$\mathbf{160^2 = 160y}$

Divide both sides by 160

$\mathbf{160 = y}$

Rewrite as:

$\mathbf{y = 160 }$

Hence, the depth of the parabolish dish is 160 feet.