Answer:
C
Step-by-step explanation:
Δ AQP and Δ ACB are similar triangles, thus the ratios of corresponding sides are equal, that is
= 
( note that AC = 3 + 6 = 9 ), substitute values
= 
( cross- multiply )
3BC = 40.5 ( divide both sides by 3 )
BC = 13,5 cm → C
Answer:
6.98%
Step-by-step explanation:
To find relative frequency we divide frequency with the total number participants in that age bracket
Total number of participants age 10-19=172.....................given in the table
The frequence for those who ski at age 10-19=12---------------given in table
Relative frequency= 12/172 = 0.0697
Expressed as a percentage= 0.06976×100 =6.98%
Divide 3 by 8 (the fraction): 3/8=.375. Make into a percent: 37.5% or 38% (depending on what your teacher wants) and that's your answer :)
The answer is commutative property
