1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andrei [34K]
2 years ago
7

A stone is thrown downward with a velocity of 88 feet

Mathematics
2 answers:
Alchen [17]2 years ago
7 0

Answer:

Step-by-step explanation:

B) the stone hits the water within the first 2 seconds. Because the stone drops at the speed of 88 feet/second, and 88 x 2 is 176. but the bridge is only 135 feet tall.

so,

88 feet/second

176 feet/2 seconds

135 feet means that it reached the river within 2 seconds. it reached the river in 1.545 seconds

Harlamova29_29 [7]2 years ago
6 0

~~~~~~\textit{initial velocity in feet per second} \\\\ h(t) = -16t^2+v_ot+h_o \quad \begin{cases} v_o=\textit{initial velocity}&88\\ \qquad \textit{of the object}\\ h_o=\textit{initial height}&135\\ \qquad \textit{of the object}\\ h=\textit{object's height}\\ \qquad \textit{at "t" seconds} \end{cases} \\\\\\ h(t)=-16t^2+88t+135

does it hit the water, hmmm when?  well, it does when h = 0, check the picture below.

~~~~~~~~~~~~\textit{quadratic formula} \\\\ \stackrel{h(t)}{0}=\stackrel{\stackrel{a}{\downarrow }}{-16}t^2\stackrel{\stackrel{b}{\downarrow }}{+88}t\stackrel{\stackrel{c}{\downarrow }}{+135} \qquad \qquad t= \cfrac{ - b \pm \sqrt { b^2 -4 a c}}{2 a} \\\\\\ t= \cfrac{ - (88) \pm \sqrt { (88)^2 -4(-16)(135)}}{2(-16)}\implies t=\cfrac{-88\pm\sqrt{16384}}{-32} \\\\\\ t=\cfrac{88\mp 128}{32}\implies t= \begin{cases} -\frac{5}{4}\\\\ \frac{27}{4} \end{cases}

well, we can do away with the negative value since "t" ⩾ 0, and only keep the 27/4.

does it hit the water within 2 seconds? well 27/4 = 6.75, so 6 seconds and some change, so nope, it took longer.

You might be interested in
Plz helplplpp this is due NOWWW
frez [133]

Answer:

Option 2

Step-by-step explanation:

1/4 is equal to .25 or 25/100

8 0
3 years ago
Read 2 more answers
Please answer this correctly without making mistakes
Gekata [30.6K]

Answer:

16

Step-by-step explanation:

The distance is given by

d = sqrt( (x2-x1) ^2 + ( y2-y1) ^2)

Since the x values are the same

d = sqrt(  ( y2-y1) ^2)

d = sqrt(  (( -6 - 10)^2))

d =  sqrt((-16) ^2)

d = 16

We can also just find the number of squares between the points since the x value is the same.

10 - -6

10+6

16

4 0
3 years ago
Read 2 more answers
When would you want to have a quadratic function in standard form ?
zepelin [54]

Answer:

hay I'm sorry that I can't give you the answer but is it okay that we talk as friends

4 0
3 years ago
6/8 is equivalent to 3/4. How can you use this to help you write 6/8 as a decimal?
Alexus [3.1K]

Answer:

0.75 is the answer

Step-by-step explanation:

6/8 is equivalent to 3/4

3 divided by 4 is 0.75

Since 6/8 is equivalent then it is also 0.75

Also 6/8 turn to 3/4 when both the numerator and denominator is divided by 2.

6 divided by 2 is 3

8 divided by 2 is 4

6 0
3 years ago
Read 2 more answers
Figure ABCD is a parallelogram with point C (3, −2). Figure ABCD is rotated 90° clockwise to form figure A′B′C′D′. What coordina
olasank [31]
After rotation the output for point C´ would be  ( - 2 . -3 ).  There is also a graph showing rotation in the attachment.
Download docx
6 0
3 years ago
Other questions:
  • Roberto decorates rectangular signs. One sign is 2/3 foot long and 1/4 foot wide. Another sign is 1/2 foot long and 1/3 foot wid
    7·1 answer
  • Which correlation coefficient represents the strongest relationship between two variables?
    12·1 answer
  • Suppose that you draw two cards from a deck. After drawing the first card, you do not put the first card back in the deck. What
    10·1 answer
  • What times 20 equals 70
    8·1 answer
  • Please try answer the question I put an image in.
    13·2 answers
  • -2x +4=8x-6 equations/inequalities
    15·2 answers
  • Is -144 rational or irrational?
    6·2 answers
  • Find the equation of a line perpendicular to y = (75)x - 1 and has a y-<br> intercept of 1.
    10·1 answer
  • Write the slope-intercept equation of the line with a slope of - 7 and a y-intercept of (0.-12)
    10·1 answer
  • Dizzy and bruised, covered in soot, he got gingerly to his feet, holding his broken glasses up to his eyes. He was quite alone,
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!