3. a concert choir is arranged, per row, according to an arithmetic sequence. there are 14 singers
in the third row and 30 singers in the seventh row.
(a) find the common difference of this arithmetic sequence

there are 10 rows in the choir and 6 singers in the first row
(b) find the total number of singers in the choir.

3= 26 more singers are on the seventh row

total amount of singers including the first question would be 60

Step-by-step explanation:

so im in the 6th grade but im pretty sure this might be wrong idk

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.