Answer:

Step-by-step explanation:
x^-y=1/(x^y) so 3t^-4=3/(t^4)
Answer:
-63
Step-by-step explanation:
-9 multiply by 7
If the biker is going at the same rate than in 3 hours he should go 34.8 miles
The trick to calculating the area here is to subdivide the diagram into smaller parts. For example, there's a 3 cm-by-3cm square. The rectangle is 4 cm by 8 cm.. The triangle has a base of 5 cm and a height of 3 cm.
Total area = area of square + area of rectangle + area of triangle
= 9 cm^2 + 32 cm^2 + (1/2)(5 cm)(3 cm)
= (9 + 32 + 7.5) cm^2
= 48.5 cm^2 (total area of figure)