30 blocks because 6 * 5 = 30
Answer:

Step-by-step explanation:
The given equation is:

so, we first isolate the exponential form that contains the unknown "z" in the exponent, by dividing both sides by 0.5:

Now we bring the exponent down by applying the natural log function on both sides, and then solve for "z":

Answer:
1200
Step-by-step explanation:
540,000/450 = 54,000/45 = 1200
Muliply 65 and 0.12 and get 7.8
Subtract 65-7.8 to get marked down price
57.2 is the price after markdown