Answer:
The volume of the pyramid is
Step-by-step explanation:
we know that
The volume of the pyramid of the figure is equal to
we have
----> the height must be perpendicular to the base
substitute
A door alarm works in 72 out of 100 cases.
surveillance camera works in 68 out of 100 cases.
The probability that method A is used = 72/100
The probability that method B is used = 68/100
Since both method are used we find the probability of A and B
Probability ( A and B) = *
=
A) 2x-7=13
2x=20
x=10
B) 3x+4=25
3x=21
x=7
Both variables (x) are 3.
4×3=12
12-2=10
16×3=48
48-8=40
3 fits the variable of the missing number.