Sowwy man i just needed the points

therefore ur answer is OPTION A 8.889 x 10-6 cm/s
Answer:
a=3
Step-by-step explanation:
This should be very simple, just substitute xy and y for 5 and 7 respectively, so 5a-2*7=1, or 5a-14=1, or 5a=15, if we divide both sides by 5, we get a=3
it is 8 or 10. multiply the 10d by 11 0r 12. 13 or 14