The phrase "a rate of approximately" is correct and usable in written English.
It can be used when discussing an estimated value or measurement, often in contexts like finance, statistics, or scientific data.
Example: "The project is expected to progress at a rate of approximately 5% per month."
Alternatives: "an estimated rate of" or "a rate close to".
ACSF was perfused at a rate of approximately 2 ml/min using a gravity-driven perfusion system.
That translates to a rate of approximately three cases for every 10,000 flutamide users, which is not many.
I understand that Mr O'Brien was enjoying a rate of approximately 1.25% when IBRC could, and arguably should, have been charging 7.5%.
The mammalian brain is bathed in the cerebrospinal fluid (CSF), which is continuously produced at a rate of approximately 500 ml fluid per day in the adult human1.
The entire system descends at a rate of approximately 10 centimetres per second, resulting in a vertical resolution of several metres for the velocity profile produced.
The red patches are fires that leapfrogged in front of the primary burn front, which was growing at a rate of approximately 5 km per hour.
Metrics for the data system indicate that the archive is growing at a rate of approximately 500 GB per year, and is supporting an increasing request rate.
"It's horrible the way these folks are treated," said Mr. Schwabe, a subcontractor who pays the workers approximately $6.50 an hour and is reimbursed at a rate of approximately $11 an hour.
Alleging that he paid unusually low interest rates on the borrowings, she said: "Mr O'Brien was enjoying a rate of approximately 1.25% when IBRC could, and arguably should, have been charging 7.5% [on] sums of upwards of €500m [£360m]".
The study's authors, Peter Bergen and Katherine Tiedemann, report that the Obama Administration has sanctioned at least forty-one C.I.A. missile strikes in Pakistan since taking office — a rate of approximately one bombing a week.
Consolidation among magazine wholesalers means that just four companies control much of what is on newsstands, and retailers are demanding that magazines, which sell at a rate of approximately 37percentt of displayed copies, improve sales performance.
