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iogann1982 [59]
3 years ago
12

By what percent (%) will a fraction change if its numerator is decreased by 10% and its denominator is decreased by 70%?

Mathematics
1 answer:
Lana71 [14]3 years ago
5 0
The fraction will change 7%
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What is the maximum height of the projectile? 82 feet 190 feet 226 feet 250 feet.
Contact [7]

The maximum height of the projectile will be 226 feet that is, as per question, the option c.

A quadratic equation , y = ax²+bx+c  (equation 1)

given, axis of symmetry is

x = \frac{b}{2a}

As per the question:

The path of the projectile is modeled using the equation :

h(t) = -16t²+48t+190  (equation 2)

h(t) = height after t time.

comparing equation 1 and equation 2, we get

a = -16 and b = 48

further, t = \frac{48}{2(-16)}

= \frac{48}{32}

= 1.5sec

Substituting the found value in equation 2, we get

h(1.5) = -16(1.5)²+48(1.5)+190

h(1.5) = -36+72+190

h(1.5) = 226ft.

Thus, the maximum height of the projectile at 1.5 sec is, 226 feet.

Note that the full question is:

A projectile with an initial velocity of 48 feet per second is launched from a building 190 feet tall. The path of the projectile is modeled using the equation h(t) = –16t2 + 48t + 190.

What is the maximum height of the projectile?

A. 82 feet

B. 190 feet

C. 226 feet

D. 250 feet

To learn more about velocity: brainly.com/question/25749514

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1 year ago
4y + 15.5 = 45.5<br> what is y?
Blizzard [7]

Answer:

Y=7.5

Step-by-step explanation:

7 0
3 years ago
Which statement must be true?
Alika [10]
<span>A. A statement cannot become a theorem until it is proven</span>
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A , B and C form a triangle where ∠ B A C = 90 ∘ . A B = 0.5 mm and B C = 15.4 mm. Find the length of A C , giving your answer r
denpristay [2]

Answer:

15•4 mm

Step-by-step explanation:

using sine rule

a÷ sinA=c ÷sinC

15•4÷sin90=0•5÷sinC

sinC =0•5 × sin90 ÷ 15•4

C =1•9°

A+B+C= 180

90+B+1•9=180

B= 88•2°

b÷sinB = a÷sinA

b÷sin88•2= 15•4÷sin90

b=sin88•2 ×15•4 ÷sin90

b =15•39

to 1 dp

b =15•4 mm

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2 years ago
Is 6 a prime number or a composite number?
lesya [120]
A composite number because other digits go it besides itself and one
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