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Eduardwww [97]
3 years ago
9

80 is 25% of what number

Mathematics
1 answer:
serious [3.7K]3 years ago
6 0
<span>The number 80 is <span>25%</span> of <span>320</span></span>
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A) work out the radius of the mercury, giving your answer as an ordinary number
guapka [62]

Answer:

a. 2,440 km

b. 1.33*10^{27} kg

Step-by-step explanation:

a. Diameter of Mercury = 4.88*10^3

Radius of Mercury = ½ of its diameter = \frac{4.88*10^3}{2}

Radius of Mercury = 2.44*10^3

To convert the radius to ordinary number, multiply 2.44 by 1,000.

Radius of Mercury as an ordinary number = 2.44*1,000 = 2,440 km

b. Mass of Jupiter = 1.898*10^{27} kg

Mass of Saturn = 5.68*10^{26} kg

Difference between mass of Jupiter and mass of Saturn = 1.898*10^{27} - 5.68*10^{26} (subtract 5.68 from 1.898 = 5.68. we would retain the largest exponent, which is raised to the lower of 27.)

= 1.33*10^{27}

7 0
3 years ago
Evaluate this expression <br> (-7--9)*(8+2)
Marizza181 [45]
Before we get started, it is good to remember PEMDAS - the acronym that tells you the order to carry out equations.

P = parentheses
E = exponents
M = multiplication
D = division
A = addition
S = subtraction

Knowing this, we should start by doing the equations <em>within </em>each parentheses.
 
(-7 - -9) *(8 + 2)
 (2) *(10)

So we did the addition and subtraction pieces within each group leaving us with the above equation. Now let's multiply:

(2)*(10) = 20

20 is the answer.
5 0
3 years ago
Help me please I’ll mark brainliest thank you
jenyasd209 [6]

Answer:

11/15=x/240

240/15=16

11 x 16=176

11/15=176/240 or rather he completes 176 passes

Step-by-step explanation:

4 0
3 years ago
What is the solution for the system<br> of equations shown IN the graph?
noname [10]

Answer:

(2,4)

Step-by-step explanation:

The solution for the system is where the two lines intersect.

The two lines intersect at x = 2 and y =4

(2,4)

5 0
2 years ago
Read 2 more answers
What does this equal to? <br> 8ft 12 in. = ____yd
MissTica
First:
3 feet=1 yard
36 inches=1 yard

8 feet=2 \frac{2}{3} of a yard
12 inches=1/3 of a yard.

2<u />\frac{2}{3}+\frac{1}{3}=2\frac{3}{3} or 3. 

Hope this helps!
8 0
3 years ago
Read 2 more answers
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