8.235×10 to the power of -4 scientific notation

Answer:

a>4

Step-by-step explanation:

-7a-11<1-4a

ADD 4a to both sides

-3a-11 <1

Add 11 to both sides

-3a <12

Divide both sides by 3

-a <4

Multiply by -1 both sides and FLIP SIGN

a>4

So  a should be 5 ,6,7,8.........

On the number line you need to count from zero  4 units to the right (positive 4) Once you are in number 4 draw an open circle which means the 4 is NOT included) Draw a line from 4 to the right because it is bigger than 4.

Interval notation is (4,∞)

[ ] a square bracket when we want to include the number 4

( ) a round bracket when we don't want to include the number 4

Answer:

Step-by-step explanation:

if he can walk 0.5 miles in 6 minutes at a constant rate then you can say that he can walk 1 mile in 12 minutes.

therefore he can walk 1/12 mile ever one minute

so m=1/12t

We want to create a proportion with minutes over miles for each person. The proportion for this problem is shown below.

30 minutes / 4 miles = 56 minutes / 7 miles

To find out if these people are running at the same rate, we can cross-multiply.

224 = 210

Because 224 and 210 are not equivalent, the people are not running at the same rate.

Hope this helps!! :)

Answer:

100 degrees

Step-by-step explanation:

because if it was in the middle i would of been 90 degrees.