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jekas [21]
3 years ago
10

The area of a square is 81m square.what is the perimeter of the square?how do you know

Mathematics
1 answer:
GuDViN [60]3 years ago
3 0

Answer:

36m

Step-by-step explanation:

If the area of a square is 81 m

A=81m

but we know that A=l² so l=radA

l=9m

p=4l

finally p=4•9=36m

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Use your calculator to find the smallest solution to <img src="https://tex.z-dn.net/?f=-5e%5E%7B-4x%2B2%7D%2B3%3D%5Cfrac%7B1%7D%
Andru [333]
I read this as -5e⁻⁴ˣ⁺²+3=½log₁₀(x²+1).
If this is not right the steps below can guide you to a possible solution when the correct formula is used.
My calculator is a Casio fx-85GT PLUS which has a function facility (MODE 3: TABLE).
I input the function: -5e⁻⁴ˣ⁺²+3-½log₁₀(x²+1). I assumed that log was log to base 10 rather than natural log ln.
The facility asks me to input a start value, end value and step value. I chose -10, 10 and 1 initially.
After a few seconds of evaluating a table of results the calculator showed me the results of plugging in x=-10 up to 10 in steps of 1.
The results showed the evaluation for each of the 21 values and I looked for the sign of the result to change.
For x=0 the result was -33.95 approx and for x=1 it was 2.1728 approx. So between 0 and 1 there is a zero, a solution for x.
I returned to the function and changed the parameters to start=0, end=1, step=0.1 to begin the next evaluation.
This time the sign change occurred between x=0.6 and 0.7.
I returned to the function with parameters: start=0.6, end=0.7, step=0.01.
The sign change occurred between 0.63 and 0.64, the start and end parameters with step=0.001 for the next iteration.
The solution is between 0.633 and 0.634.
Repeat the process one more time with step=0.0001. The sign change was between 0.6338 and 0.6339 so the solution to three dec places is 0.634.
7 0
3 years ago
After the bank cashed a check Maureen wrote for $60, her balance was -$14. The equation
Andrew [12]

Answer:

The initial cash balance in bank is $46

Step-by-step explanation:

The equation given to determine b which is the initial money before she withdrew $60 is

b + (-60) = -14

Let's solve for the value of b which is the initial balance of the money in the bank.

b + (-60) = -14

b -60 = -14

b = -14+60

b = 60-14

b = 46

The initial money before she withdrew $60 was $46

8 0
3 years ago
Can someone please help me?! 100% sure please
AleksAgata [21]
3 + 3/4x > = 15
3/4x > = 15 - 3
3/4x > = 12
x > = 12 / (3/4)
x > = 12 * 4/3
x > = 48/3 = 16 sessions <==
================
-p - 4p >  -10
-5p > -10
p < -10/-5
p < 2 <===
===============
-3 - 6(4x + 6) > = 9
-3 - 24x - 36 > = 9
-24x - 39 > = 9
-24x > = 9 + 39
-24x > = 48
x < = -48/24
x < = -2 <===
=================
2x - 2 > = 10
2x > = 10 + 2
2x > = 12
x > = 12/2
x > = 6........so ur solution set is {6,7}

8 0
3 years ago
Solve for t:<br><br> t + 1 = 24<br> A. t = 23<br> B. t = 25<br> C. t = 31<br> D. t = 20
Flauer [41]

Answer:

t = 25

Step-by-step explanation:

T is 25 because you take 1 away from the t+1 side and add the 1 to the 24 side.

3 0
3 years ago
Read 2 more answers
Which irrational number is closest to the number 5?
blsea [12.9K]

Answer:

I believe it is right by looking at this picture, but I am not certain

7 0
4 years ago
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