Step-by-step explanation:
a/q both the traingles are similar/congruent so,
theri angles also have equal value
angle Q = angle A
so,
apply angle sum property of triangle in ∆PQR
so according to it
Angle
P + Q + R = 180
→ 45° + 15° + Q = 180
→ 60° + Q = 180
→ Q = 180 - 60 = 60°
→ angle Q = 60°
therefore, angle A = 60°
Angle R = angle B
so,
angle B = 15°
as, angle P = angle C
so,
angle C = 45°
<em><u>hope </u></em><em><u>this</u></em><em><u> answer</u></em><em><u> helps</u></em><em><u> you</u></em><em><u> dear</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>take </u></em><em><u>care</u></em><em><u> </u></em><em><u>and</u></em><em><u> may</u></em><em><u> u</u></em><em><u> have</u></em><em><u> a</u></em><em><u> great</u></em><em><u> day</u></em><em><u> ahead</u></em><em><u>!</u></em>
Answer: a) 453 b) 1537
Step-by-step explanation:
As per given , we have
Margin of error : E= 0.025
Critical value for 95% confidence interval : 
a) The prior estimate of population proportion : p=0.08
Required sample size :-

The minimum sample size is 453 U.S. adults.
b) Since the prior estimate of population proportion is not available , so we take p= 0.5
Required sample size :-

The minimum sample size is 1537 U.S. adults.