Math question

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0.84 miles

Step-by-step explanation:

80% is the same as 0.8, so 0.8*4.2=3.36. This means he has completed 3.36 miles. So, to find how much he has left, subtract. 4.2-3.36=0.84. Therefore, he has 0.84 miles left in his hike.

b i think

step-by-step explanation:

not really sure

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500