Answer:
<em>The surface area is multiplied by 4/9.</em>
Step-by-step explanation:
<u>Surface Area of a Cone</u>
Being r the radius and l the slant height of a cone, then its surface area is
Now let's think both the radius and the slant height are multiplied by the same factor k, i.e.
r'=kr
l'=kl
The new surface area is
The new surface area is the 
times original SA. Since k=2/3, then
The surface area is multiplied by 4/9.
There will be 180 mL of water left.
To convert liters to milliliters, multiply by 1000:
0.4(1000) = 400
Each student will use two 5-mL spoons of water; 2(5) = 10 mL each. 10(22) = 220 total mL
400-220 = 180 mL left
1 hour = 60 minutes.
Divide the number of words per hour by 60:
86 / 60 = 1.433333
Rounded to the nearest tenth = 1.4 words per minute.
The rocket will reach 119 feet above the ground in 50.85 seconds.
Given that a rocketry club is launching model rockets, and the launching pad is 30 feet above the ground, and your model rocket has an initial vertical velocity of 105 feet per second, to determine after how many seconds is your rocket 119 feet above the ground the following calculation must be performed:
- (119 - 30) / 105 = X
- 89/105 = X
- 0.847 = X
- 1 = 60
- 0.847 = X
- 0.847 x 60 = X
- 50.85 = X
Therefore, the rocket will reach 119 feet above the ground in 50.85 seconds.
Learn more in brainly.com/question/9163788
