Answer: the answer is C 52
Step-by-step explanation:
1)
a1 = 2*5
a2= 2*2*5
a3= 2*3*5
...
an=2n -*5
2)
u1 = a
u2 = a +4
u3 = a + 2 * 4
u4 = a + 3 * 4
un = a + ( n - 1 )* 4
Answer:
B 30% you can divide 160 the total by 10then multiply and you can check B and C