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sergey [27]
2 years ago
15

Find the total surface area of the rectangular pyramid.

Mathematics
2 answers:
pantera1 [17]2 years ago
5 0

Answer:

I can't really understand the wording but..

Step-by-step explanation

The formula for surface area of a rectangular prism is A=2(wl+hl+hw)

so yeah enjoy freedom for the rest of the day

VashaNatasha [74]2 years ago
4 0
12 because 12 is never wrong and 12 is an amazing number
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I need to find out the answer to the following questong.HELP!!!!!!!!<br> 3×9+10×36/6​
____ [38]
The answer would be 87.
6 0
3 years ago
Read 2 more answers
A rock was thrown from the top of a cliff such that its distance above sea level was given by s(t)= at² + bt + c, where t is the
frutty [35]

Answer:

<h2>a) a = -3, b = 18, c = 48; </h2><h2>s(t) = -3t²+18t+48</h2><h2>b) 48m</h2><h2>c) 8secs</h2>

Step-by-step explanation:

The question is incomplete. Here is the complete question.

'A rock was thrown from the top of a cliff such that its distance above sea level was given by s(t)=at²+bt+c, where t is the time in seconds after the rock was released. After 1 second the rock was 63 m above sea level, after 2 seconds 72 m, and after 7 seconds 27 m. a. Find a, b and c and hence an expression for s(t). b. Find the height of the cliff. c. Find the time taken for the rock to reach sea level.'

Given the equation of the distance modelled as s(t)=at²+bt+c

If after 1 second the rock was 63 m, then 63 = a+b+c

If after 2 seconds, the distance was 72 m then 72 = 4a+2b+c

Also if after 7 seconds, the distance is 27 m, then 27 = 49a+7b+c

i) Solving the 3 equations simultaneously to get a, b and c we have;

a+b+c = 63 ... 1

4a+2b+c = 72 ...2

49a+7b+c = 27 ...3

Subtracting 2 from 1 and 3 from 2 we will generate 2 new equations as shown;

eqn 2- eqn1: 3a + b = 9...4

eqn 3- eqn 2: 45a + 5b = -45

eqn 3- eqn 2: 9a+b = -9 ... 5

solving 4 and 5 simultaneously

3a + b = 9 ...4

9a+b = -9 ... 5  

Taking the difference of 4 and 5 we have

6a - -9-9

6a = -18

a = -3

substituting a = -3 into equation 4 to get b we have;

3(-3)+b = 9

-9 + b = 9

b = 9+9

b = 18

substituting a = -3 and b = 18 into equation 1 to get c we have;

-3+18+c = 63

15+c = 63

c = 48

a = -3, b= 18 and c = 48

The distance function will be s(t) = -3t²+18t+48

ii) If the height of the cliff is modelled by the equation  s(t)=at²+bt+c

The height of the cliff is at when t = 0

s(0) = -3(0)²+18(0)+48

s(0) = 48m

The height of the cliff is 48m

iii) At the sea level, the height of the rock will be 0m, substituting this into the modeled equation for the height to get the time we have;

s(t)=at²+bt+c

0 = -3t²+18t+48

3t²-18t-48 = 0

t² - 6t - 16 =0

t² - 8t+2t - 16 = 0

t(t-8)+2(t-8) = 0

(t+2)(t-8) = 0

t = -2 or 8

Taking the positive value of the time, t = 8secs

Time taken for the rock to reach sea level is 8secs

7 0
3 years ago
Write an equation to describe the sequence below use and to represent the position of a term in the sequence where n equals one
Katen [24]

Answer:

  an = 4^(n-1)

Step-by-step explanation:

The three given terms have a common ratio of 4:

  4/1 = 16/4 = 4

So, this can be described by the function for a geometric sequence:

  an = a1×r^(n -1)

where an is the n-th term, a1 is the first term (1) and r is the common ratio (4).

  an = 1×4^(n-1)

  an = 4^(n -1) . . . . . simplified

6 0
3 years ago
What is the ratio of 12m to 10m
Hoochie [10]
Since units are same, they can be disregareded for now
12 to 10=12:10
treat as fraction
12/10=6/5
ratio is 6:5
4 0
3 years ago
What is the answer to b?
Mama L [17]

Answer:

43

Step-by-step explanation:

3 0
3 years ago
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