2. The number of days needed in preparing the modules in Math 9 for quarter 2 varies inversely as the number of teachers working. It takes 15 days for 2 teachers to prepare the modules. How many teachers are needed to complete the job in 6 days?

Answer: 5 Teachers

Step-by-step explanation:

formula

N = k/T

where N=number of days

T= Teachers

Solving for the constant(k)

N=k/T

15=k/2

30=k

Solving for the unknown (or teachers)

N=k/T

6=30/T

6(T)=30

T=30÷6

T=5

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3. The amount of gasoline used by a car varies jointly as the distance travelled and the square root of the speed. Suppose a car used 25 liters on a 100 kilometer trip at 100km/hr. About how many liters will it use on a 150 kilometer trip at 64 km/hr?

Answer: 38 2/5 liters