Mathematics, 06.08.2021 14:00 aleah1616
A student answers 20 out of the first 32 questions correctly, but gets three-quarters of remaining questions wrong. all the questions are equal value. if the students' score is 40%, how many questions were there is exam?
Answers: 1
questions on this exam.
denote the number of questions on this exam in total (including the first 
questions.)
questions after the first 
) of these 
right answers.
.
of the 
.
.
.
.
.
.
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 21:30, Brendah7145
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?
Answers: 1
Mathematics, 22.06.2019 00:00, nshadow2920
Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?
Answers: 3
You know the right answer?
A student answers 20 out of the first 32 questions correctly, but gets three-quarters of remaining q...
Questions in other subjects:
English, 15.12.2021 19:20
History, 15.12.2021 19:20
Mathematics, 15.12.2021 19:20
Biology, 15.12.2021 19:20
Spanish, 15.12.2021 19:20
