A car travels at a constant speed of 20 meters per second. work out the distance travelled in meters by the car after: a)4 seconds b)3 mins c)2 hours
***not multiple choice​

Distance = Speed×Time

Speed = 20m/s

a) = 20×4

= 80m

b) 3 mins = 180s

= 20×180

= 3,600m

c) 2 hours = 7200s

= 2 × 7200

= 14,400m

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225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

(a) {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …}

(b) $59 398

step-by-step explanation:

(a) the annual sequence of profits

aₙ = a₁rⁿ⁻¹

the model for the sequence of profits is {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …} .

(b) profit after 15 yr

  a₁ = $ 30 000

  r = 1.05

a₁₅ = 30 000 × 1.05¹⁴

a₁₅ = 30 000 × 1.979 93

a₁₅ = $59 398

the profit in year 15 will be $59 398.