Ask question

Ask question

All categories

4 years ago

13

The half life of a drug in 3 hours. If the drug is administered with a dose of 640mgs and the patient in not allowed to drive un

told only 80mgs are present. How long before the patient can drive p

1 answer:

r-ruslan [8.4K]4 years ago

6 0

Answer: 12 hours

Step-by-step explanation: 6 h = 360 min,9 h = 540 min, 12 h = 720 min

640-360=280 , 640-540=100 , 640-720=-80

You might be interested in

What percent of the goal had the 6 grade reached in September?

jeyben [28]

Step-by-step explanation:

4 0

3 years ago

16x² -9 = 4×² + (4x²+9)

lesya [120]

For this case we must solve the following equation:

$16x ^ 2-9 = 4x ^ 2 + (4x ^ 2 + 9)$

We remove the parentheses on the right side:

$16x ^ 2-9 = 4x ^ 2 + 4x ^ 2 + 9$

We add similar terms on the right side:

$16x ^ 2-9 = 8x ^ 2 + 9$

We subtract $8x ^ 2$ from both sides of the equation:

$16x ^ 2-8x ^ 2-9 = 9\\8x ^ 2-9 = 9$

We add 9 to both sides of the equation:

$8x ^ 2 = 9 + 9\\8x ^ 2 = 18$

We divide by 8 on both sides of the equation:

$x ^ 2 = \frac {18} {8}\\x ^ 2 = \frac {9} {4}$

We apply square root to both sides of the equation:

$x = \pm \sqrt {\frac {9} {4}}$

We have two roots:

$x_ {1} = \frac {3} {2}\\x_ {2} = - \frac {3} {2}$

Answer:

$x_ {1} = \frac {3} {2}\\x_ {2} = - \frac {3} {2}$

4 0

3 years ago

What is the surface area of a triangular prism,

andriy [413]

Answer:

A=132

Step-by-step explanation:

A=ah+bh+ch+1

2﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=3·10+4·10+5·10+1

2·﹣34+2·(3·4)2+2·(3·5)2﹣44+2·(4·5)2﹣54=132

8 0

3 years ago

Please help quick!!! Jamie purchased a DVD that was on sale for 15% off. The sales tax in her county is 5%. Let y represent the

Vesnalui [34]

Answer: 1.05(0.85y)

Step-by-step explanation:

i think that is correct

8 0

3 years ago

Read 2 more answers

A movie theatre has 24 screens. The ratio of action films to other films currently showing on all of the screens is 1:2. How man

Sergeu [11.5K]

Answer:

8

Step-by-step explanation:

1 : 2

= 1 +2

= 3

action movie

1 ÷ 3 × 24 = 8

other movie

2 ÷ 3 × 24 = 16

If 1 action movie is to 2 other films it means on the 24 screens will be 8 action movies to 16 other films.

3 0

3 years ago