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3 years ago

Find the total surface area of the net bellow

Mathematics

1 answer:

9966 [12]3 years ago

4 0

Answer: 102.4 cm^2

Step-by-step explanation:

find the surface area of all of the rectangles

7.2(4)=28.8

7.2(2)=14.4

7.2(4)=28.8

7.2(2)=14.4

4(2)=8

add

28.8+14.4+28.8+14.4+8+8=102.4

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julia-pushkina [17]

Answer:

5500 meters

Step-by-step explanation:

Meters = m

Kilometres = km

We use the general formula,

1 km = 1000 m

Then by using the general formula,

5.5 km = ? m

→ 5.5 km/1 km × 1000 m

→ 5.5 m × 1000 m

→ 5500 m

Hence, the solution is 5500 m.

3 0

4 years ago

Which represents the solution set of the inequality 5x-9<=21

GrogVix [38]

The answer is x<6

First you add 9 from both sides and your new equation should be 5x<30

Next you divide 30 by 5 and your final answer will be x<6

7 0

4 years ago

If a certain cannon is fired from a height of 8.8 meters above the ground, at a certain angle, the height of the cannonball ab

Dennis_Churaev [7]

Answer:

It would take approximately 6.50 second for the cannonball to strike the ground.

Step-by-step explanation:

Consider the provided function.

$h(t)=-4.9t^2+30.5t+8.8$

We need to find the time takes for the cannonball to strike the ground.

Substitute h(t) = 0 in above function.

$-4.9t^2+30.5t+8.8=0$

Multiply both sides by 10.

$-49t^2+305t+88=0$

For a quadratic equation of the form $ax^2+bx+c=0$ the solutions are: $x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Substitute a = -49, b = 305 and c=88

$t=\frac{-305+\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}=-\frac{-305+\sqrt{110273}}{98}\\t = \frac{-305-\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}= \frac{305+\sqrt{110273}}{98}$

Ignore the negative value of t as time can't be a negative number.

Thus,

$t=\frac{305+\sqrt{110273}}{98}\approx6.50$

Hence, it would take approximately 6.50 second for the cannonball to strike the ground.

6 0

3 years ago

Help please 20 pointss

eimsori [14]

Answer:

0.25c

Step-by-step explanation:

.25 is the decimal form of 25%. .25 * c is how you get the amount you don't have to pay on this item.

For example:

.25 * 10= 2.5

10-2.5=$7.5

6 0

3 years ago

Which of the following could be used as an example of a mass of one kilogram?

PIT_PIT [208]

Answer:

i would think C

Step-by-step explanation:

3 0

3 years ago

Find the total surface area of the net bellow￼

Find the total surface area of the net bellow