PLEASE HELP Given the function f(x) = 3x2 – 4
1 answer:
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Answer:
$1.25
September
$30
Step-by-step explanation:
Let's take this a step a time.
First we need to find how much the price of the flowers were in September.
We know that each flower cost $1.50 on October.
The October price was a 20% increase of the September price.
To calculate for the price of the flowers on September, we can solve it like this:
Let x = Price during September
1.2x = 1.50
We used 1.2 because the price of $1.50 is 120% of the original price.
Now we divide both sides by 1.2 to find x.
x = 1.25
The price of the flowers during September was $1.25 each.
Now the 7th grade class earned 40% of the selling price of each flower.
40% = 0.40
To find how much they made on each month, we simply multiply the percentage to the price and the number of flowers sold.
September = 0.40 x 1.25 x 900
September = 0.5 x 900
September = $450
Now for October.
October = 0.40 x 1.50 x 700
October = 0.6 x 700
October = $420
The 7th Graders earned more on September.
They earned $30 more on September than October.
The missing figure is attached
The expression represents the volume in cubic units of the composite figure is (Four-third)π(10)³ + π(10)²(28) ⇒ 1st answer
Step-by-step explanation:
The figure consists of
- Two hemispheres
- A cylinder
The volume of the hemisphere = , where r is its radius
The volume of the cylinder = πr²h, where r is its radius and h is its height
∵ The diameter of the hemisphere s and the cylinder is 20 units
∵ The radius = diameter
∴ The radius = × 20 = 10 units
∵ The volume of a hemisphere = πr³
∵ r = 10
- Substitute r by 10 in the rule
∴ The volume of a hemisphere = π(10)³
∵ The volume of the cylinder = πr²h
∵ h = 28 and r = 10
- Substitute h by 28 and r by 10 in the rule
∴ The volume of the cylinder = π(10)²(28)
∵ The volume of the figure = 2(volume of a hemisphere) +
volume of the cylinder
∴ The volume of the figure = 2( )π(10)³ + π(10)²(28)
∵ 2 × =
∴ The volume of the figure = π(10)³ + π(10)²(28)
The expression represents the volume in cubic units of the composite figure is (Four-third)π(10)³ + π(10)²(28)
Learn more:
You can learn more about the volume of figures in brainly.com/question/12497249
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