Answer:
r = 15
Step-by-step explanation:
10(8r + 23) = 1430
Divide both sides by 10.
8r + 23 = 143
Subtract 23 from both sides.
8r = 120
Divide both sides by 8.
r = 15
A cluster sample is one in which the population is divided into groups and a random sample of groups is drawn.
There will be 10 commercials if one hundred songs
Answer:
B
Step-by-step explanation:
Using the Sine Rule in ΔABC
= =
∠C = 180° - (82 + 58)° = 180° - 140° = 40°
Completing values in the above formula gives
= =
We require a pair of ratios which contain b and 3 known quantities, that is
=
OR
= → B
A) Scale of map is 1: 30,000
This is assuming that it meant 1 centimetre = 30,000 metres, for it gives no other information.
Multiply 1 with 30,000: 30,000 x `1 = 30,000
30,000 metres is your answer.
B) Scale is 1 inch: 6 miles. You are given 2.5 inches.
Remember that 1 inch = 6 miles.
Multiply 2.5 to both sides: (2.5) * 1 inch = (2.5) * 6 miles
2.5 inch = 2.5 * 6 miles
2.5 inch = 15 miles
15 miles is your answer.
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