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AlladinOne [14]
3 years ago
10

if a ball is thrown into the air with a velocity of 40 ft s its height in feet after t seconds is given by s(t)=40t-16t2 find th

e average velocity for the ball during the time[1,2]
Mathematics
1 answer:
dalvyx [7]3 years ago
4 0

Answer with Step-by-step explanation:

We are given that a ball is thrown into the air with velocity

v=40ft/s

Height  after t seconds is given by

s(t)=40t-16t^2

We have to find the average velocity for the ball during the time [1,2].

We know that average velocity=\frac{ds}{dt}

Average velocity=v=\frac{d(40t-16t^2)}{dt}=40-32t

Substitute t=1 then we get

Average velocity=40-32(1)=40-32=8 m/s

Substitute t=2 then

Average velocity=40-32(2)=40-64

Average velocity[/tex]=-24 m/s[/tex]

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Squareroot(y-1) + 3 = y
jek_recluse [69]
Note:xy means x times y and x(y) means the same thing

so
first we get rid of square root then
make the equation equal to zero becaues if
xy=0 then x or/and y=0



squareroot(y-1)+3=y

isolate the squareroot
subtrac 3 from boht sides

squareroot(y-1)=y-3

square both sides (since they are equal, you should be able to square both sides and still make it true)

(squareroot(y-1))^2=(y-3)^2
(y-1)=(y-3)(y-3)
y-1=y^2-6y+9
subtrac y from both sides
-1=y^2-7y+9
add 1 to both sides
0=y^2-7y+10
find what two number multiply to make 10 and add to get -7
the answer is -2 and -5

0=(y-5)(y-2)
therfore
y-5=0
and/or
y-2=0

therefor
y=5 or/and 2 might work
let's try out 2
square root(2-1)+3=2
square root(1)+3=2
1+3=2
false
so 2 doesn't work



let's try 5
squareroot(5-1)+3=5
squareroot(4)+3=5
2+3=5
5=5
true

y=5
7 0
3 years ago
Cheryl moves houses. Her old house is 3 kilometers from her new house. How many meters is it from the old house to the new house
d1i1m1o1n [39]

Answer:

3000 here hope this helps you out

3 0
2 years ago
1/3y=3<br> Find the value of y
Ivanshal [37]
Answer is 1/9
Hope it help!!

6 0
3 years ago
The distance between the pair of points (3,5) and (11,11)
statuscvo [17]

Formula: d = √(x2-x1)²+(y2-y1)²

d = √(11-3)²+(11-5)²

d = √8²+6²

d = √64+36

d = √100

d = 10

Best of Luck!

5 0
3 years ago
Read 2 more answers
a sock drawer has 6 white socks, 6 brown socks, and 4 black socks. you randomly pick 2 socks and get a matching pair of black so
klasskru [66]

Answer:

1/20

Step-by-step explanation:

Remark: Not huge

Total number of Socks: 6 + 6 + 4 = 16

P(First Black Sock):  4/16 = 1/4

The second Sock needs to be discussed a bit. The number of black  socks has gone down to 1 and the total will always go down by 1.

Second Sock: 3 Black / 15 Total = 3/15 = 1/5

Combined Probability: 1/4 * 1/5 = 1/20

5 0
3 years ago
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