Answer:
280
Step-by-step explanation:
Margin of error = critical value × standard error
Here, the margin of error is 2.
At 99% confidence, the critical value is z = 2.576.
The standard error is s / √n = 13 / √n.
2 = 2.576 (13 / √n)
2 = 33.49 / √n
√n = 16.74
n = 280.4
Rounded to the nearest person, the required sample size is 280.
Answer:
A letter T is folded vertically through the middle.
Step-by-step explanation:
Reflectional symmetry refers to the symmetry of line that divides the given shape into two equal halves. The halves represent the mirror reflection of each other. The line of symmetry is drawn to show the reflection and it acts as a mirror. For the letter 'T', the reflectional symmetry will be drawn vertically in the middle of the letter. The line divides the letter into two equal halves with mirror images.
Answer:
f(-2)=-11
Step-by-step explanation:
f(x)=2x-7
f(-2)=2(-2)-7=-4-7=-11
