Which data set has the smallest standard deviation? A. 55, 90, 34, 78, 15, 20, 19
B. 1000, 1001, 1002, 1000, 1001, 1001
C. 1, 9, 120, 9, 1, 1, 9
D. 7, 8, 89, 1005, 23400, 5, 3

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.