John is 4 years older than marie. in ten years, he will be twice as old as marie. how old is marie now?
a.
6
b.
8
c.
10
d.
12
e.
14

2) the relationship between temperature in degrees fahrenheit, f, and units kelvin, k, is given by the formula k32) 273.15. which of the following readings, in kelvins, is equivalent to a fahrenheit reading of 7 (rounded to the nearest hundredth decimal place)?

Why should children should be allowed to vote at elections? explain

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force