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LenKa [72]
3 years ago
8

The function f(x) = -3/4x^2 +9/2x models, in feet, the shape of a doorway arch on a historic building. How high is the

Mathematics
1 answer:
slamgirl [31]3 years ago
3 0
Is has to be 7.25 feet.
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if Mary walks up three steps in three seconds, then how many seconds would it take to walk up the Lincoln Memorial (eighty-seven
Minchanka [31]

Answer:

87 seconds

Step-by-step explanation:

1 step = 1 second

87 steps is going to equal 87 seconds

Hope this helps! have a blessed day.

6 0
3 years ago
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If the ratio of the radii of two spheres is 2:3, the ratio of their surface areas will be 8:27.
Slav-nsk [51]
<span>The ratio of 2 similar areas is the square of the ratio of their RADIUS or (sides)
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4 0
3 years ago
A stockbroker has money in three accounts. The interest rates on the three accounts are 7%, 8%, 9%. If she has twice as much mon
Sveta_85 [38]

Answer:

x=amount invested at 7%

2x=amount invested at 8%

3x=amount invested at 9%

interest=principal*rate*time (time=1 year)

$150=0.07x+0.08*2x+0.09*3x

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$150=0.50x

$1500=5x

x=$300 invested at 7%

2x=$600 invested at 8%

3x=$900 invested at 9%

Step-by-step explanation:

5 0
3 years ago
80 percent of 230 is the same as 25 percent of what number?
vredina [299]

Answer:

736

Step-by-step explanation:

.8x230=184, 184x4=736

7 0
3 years ago
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A family on a trip budgets $1,000 for meals and gasoline. If the price of a meal for the family is $50 and if gasoline costs $3.
galben [10]

Answer:

They can buy 13meals if they buy 100 gallons of gasoline.

Step-by-step explanation:

3.50 PER gallon so 1 gallon is $3.50

if they buy 100 gallons you have to multiply 3.50 by 100 which gives you 350. you subtract 350 from 1000 so 1000-350 and get 650. now, you divide 650 by 50 because each meal is $50. And you get 13 so there you have it.

3 0
3 years ago
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