With properties and exponents math problems? 5.35n= to the negative 12th power?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

Susan is paying $0.30 per $100 on her $483,000 home in homeowners insurance annually. if her annual homeowners insurance premium is divided into twelve equal monthly installments to be included on each of her monthly mortgage payments of $2,128.00, what is her total monthly payment?