N WXYZ is a triangular-based pyramid.
The base is an equilateral triangle.
9 cm
380
Calculate the acute angle XZY to the nearest degree.
X
[2]
W
7 cm
Angle ZWY is obtuse.
Calculate the acute angle WYZ to the nearest degree.
[2]
Y
Find the total surface area of the pyramid to the nearest cm2.
cm2
[3]
Mark it

the correct answer is 828.07

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation:

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: