Answer:
43%
Step-by-step explanation:
There are 39 girls. 21 of them like biology. 11 out of 34 who like chemistry are girls.
No. of girls who prefer biology = 21
There are (100-39) boys. 16 of them like physics. (34-11) of them like chemistry.
No. of boys who prefer biology = 100-39-16-34+11
= 22
Percentage of students who prefer biology = 
× 100%
= 
× 100%
= 43%
Answer:
13✓7
Step-by-step explanation:
5✓28 + ✓63
Break the radical into perfect squares.
5 times ✓4 times ✓7 + ✓9 times ✓7
5 times 2 times ✓7 + 3 ✓7
10✓7 + 3✓7
13✓7
B. 12
Because you take 29 and subtract 17
The answers for A is 25.5 and the answer for B is -34.47
Answer:
90.60 pounds
Step-by-step explanation:
So with this question, we have both a set rate and a variable rate.
To work out the answer, we will find the cost of calls made. To do this, we need to multiply the amount of minutes of calls by the rate given.
In this case, it costs 18p per minute, and 420 minutes of calls have been made. So we will multiply 18p by 420 minutes:
18 x 420 = 7560p
When we convert this to pounds, it becomes 75.60 pounds.
We add this amount to the set rate, which is 15 pounds:
75.60 + 15 = 90.60 pounds
(I hope I did the conversion from pence to pounds right, my currency is the dollar, so I wasn't completely sure.)
Hope this helps,
Cate
